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Recent Natural Gas Industry B Articles

Recently published articles from Natural Gas Industry B.

A major discovery in Permian volcanic rock gas reservoir exploration in the Sichuan Basin and its implications

August 2019
Xinhua Ma | Yu Yang | Jian Zhang | Jirong Xie

Recently, a high-yield gas flow of 22.5 × 104 m3/d was achieved in the wildcat well Yongtan 1, deployed by PetroChina Southwest Oil and Gasfield Company, and an extrusive facies volcaniclastic gas reservoir...

A new high-precision timely monitoring and metering system for early kick and loss

August 2019
Huangang Zhu | Shujiang Wang | Zongqing Li | Xiuliang Yan | Zhongwen Song | Peibin Gong

Kick and loss are two complicated incidents that affect the construction safety in oil and gas well drilling. The commonly-used kick/loss monitoring methods are disadvantageous with monitoring lag and...

Automatic defect identification technology of digital image of pipeline weld

August 2019
Shaohua Dong | Xuan Sun | Shuyi Xie | Mingfeng Wang

Digital image of pipeline weld is an important basis for the reliability management of pipeline welds. However, the error rate of artificial discrimination is high. In order to increase the defect identification...

Numerical simulation on multi-stage fractured horizontal wells in shale gas reservoirs based on the finite volume method

August 2019
Xiaofan Chen | Chao Tang | Zhimin Du | Liandong Tang | Jiabao Wei | Xu Ma

In order to simulate the flowing of shale gas in multi-scale media, we established a mathematical model for the unsteady seepage of multi-stage fractured horizontal wells in shale gas reservoirs in...

Development and application of new technologies and equipment for in-line pipeline inspection

August 2019
Tiehua Hu | Jingbo Guo

In-line inspection is one of the most effective technical measures to ensure the safety of oil and gas pipelines. However, the extensive application of oil and gas pipelines of high-carbon steel, large...

Characteristics and controlling factors of deep buried-hill reservoirs in the BZ19-6 structural belt, Bohai sea area

August 2019
Mingcai Hou | Haiyang Cao | Huiyong Li | Anqing Chen | Ajuan Wei | Yang Chen | Yuechuan Wang | Xuewei Zhou | Tao Ye

The BZ19-6 deep buried-hill structural belt in the southwest of Bozhong Sag, Bohai Bay Basin, is a newly discovered super-giant oil and gas bearing area. The study on its reservoirs is still in the...

Mechanism of fracture damage induced by fracturing fluid flowback in shale gas reservoirs

August 2019
Lijun You | Benbin Xie | Jian Yang | Yili Kang | Huifen Han | Liang Wang | Bin Yang

In this paper, the Lower Silurian Longmaxi shale samples and the backflow fracturing fluid in the Changning Block of the Sichuan Basin were selected to investigate the damage mechanism of retained fracturing...

Chemical–microwave–ultrasonic compound conditioning treatment of highly-emulsified oily sludge in gas fields

August 2019
Biyun Su | Li Huang | Shanjian Li | Liqin Ding | Bo Liu | Ao Zhang

The highly-emulsified oily sludge in gas fields is complex in components and serious in emulsification, which makes effective reduction extremely difficult only by a single direct mechanical separation...

A magnetic torque optimization method for a hydraulic – magnetic coupling-drive cuttings cleaning tool

August 2019
Xiaofeng Sun | Qiaobo Hu | Lipeng Yan | Ye Chen | Kebo Zhang | Jingyu Qu

During the drilling process, cuttings carrying in the horizontal well section is relatively difficult, and cuttings beds form easily. A new type of hydraulic – magnetic coupling transmission cuttings...

Geological characteristics and enrichment laws of normal-pressure shale gas in the basin-margin transition zone of SE Chongqing

August 2019
Xipeng He | Guisong He | Yuqiao Gao | Peixian Zhang | Shuangfang Lu | Jingya Wan

The southeastern Sichuan Basin and its basin-margin transition zone (hereinafter referred to as “the basin-margin transition zone of SE Chongqing”) is the focus of normal-pressure shale gas exploration...

Characteristics of multi-scale pore structure of coal and its influence on permeability

August 2019
Jienan Pan | Zhaozhao Zhang | Meng Li | Yawen Wu | Kai Wang

Due to the uneven distribution of pore size in coal and its wide distribution range, it is difficult to effectively characterize the multi-scale pore structure of coal by a single method. In this paper,...

A calculation method for the allowable fracturing injection pressure of preventing casing deformation

August 2019
Xinpu Shen | Ping Zhang

Injection pressure is one of the key parameters used in the design of shale gas reservoir stimulation. Higher injection pressure helps to initiate fractures, inject fracturing fluid and proppant smoothly...

An experimental analysis on the elastic mechanical parameters of weakly-consolidated non-diagenetic gas hydrate sediments

August 2019
Jun Zhao | Xinran Xiang | Jinzhou Zhao | Haitao Li | Ping Guo | Liehui Zhang | Shouwei Zhou | Na Wei | Qingping Li | Weixin Pang

Gas hydrate (hereinafter, "hydrate" for short) in the marine environment mostly lies in weakly consolidated sediments, so its undisturbed coring is difficult and costly. In view of this, it is necessary...

Pore characteristics and evolution of Wufeng–Longmaxi Fms shale gas reservoirs in the basin-margin transition zone of SE Chongqing

August 2019
Yuqiao Gao | Xiao Cai | Peixian Zhang | Guisong He | Quanfang Gao | Jingya Wan

At present, researches on the pore evolution of shale reservoir and its evolution mechanism are still at such a groping stage that a consensus has not yet reached. Based on core analysis and thermal...

Construction of data resource sharing center of the Puguang Intelligent Gas Field

June 2019
Yiwei Jiang | Jinxian Li | Hanwei Zhang | Qingyin Wang | Yanqiu Yu | Chunguang He | Meisheng Liang

During the initial construction of the Puguang Gas Field, information infrastructure was built. Due to the absence of unified planning and deployment, however, many “isolated information islands” were...

An optimal design of crushing parameters of marine gas hydrate reservoirs in solid fluidization exploitation

June 2019
Guorong Wang | Rong Huang | Lin Zhong | Leizhen Wang | Shouwei Zhou | Qingyou Liu

To select reasonable excavating and crushing process parameters and nozzle structure parameters is one of the key factors to realize commercial excavation of marine natural gas hydrate (hereinafter...

Enrichment laws and scale effective development of shale gas in the southern Sichuan Basin

June 2019
Xinhua Ma

Based on the newest understandings of geological assessment and new progresses in engineering technologies in the development of shale gas rich in the southern Sichuan Basin, this paper analyzed the...

Laws of multi-fracture coupling initiation during blasting induced hydraulic fracturing

June 2019
Feipeng Wu | Ersi Xu | Xuemei Wei | Hengchao Liu | De Li | Qianshen Ding

For figuring out the stress interference of multiphase fracture combinations and its effect on the fracture initiation pressure of subsequent hydraulic fracturing, a calculation model for the coupled...

Non-equilibrium multiphase wellbore flow characteristics in solid fluidization exploitation of marine gas hydrate reservoirs

June 2019
Na Wei | Jinzhou Zhao | Wantong Sun | Shouwei Zhou | Liehui Zhang | Qingping Li | Qiang Fu | Xin Lü | Lijun Zheng

In the core process of fractured marine gas hydrate (hereinafter referred to as hydrate) particles being transported up to the surface platform by airtight pipeline in the solid fluidization exploitation...

Geological conditions and exploration potential of Permian marine–continent transitional facies shale gas in the Sichuan Basin

June 2019
Xusheng Guo | Dongfeng Hu | Ruobing Liu | Xiangfeng Wei | Fubin Wei

Marine–continent transitional facies shale of the Longtan Fm, Upper Permian is an important source rock stratum in the Sichuan Basin. The previous researches on it mainly focus more on source rock evaluation,...

Development dynamic monitoring technologies used in the Puguang high-sulfur gas field

June 2019
Daqian Zeng | Xinling Peng | Dekui Fu | Jie Hu | Xiaolei Wu | Junfa Zhang

There is lack of performance monitoring technologies and related standards and specifications in the Puguang gas field, which is ultra-deep with high sulfur content. In this paper, five key technologies...

Design and implementation of the overall architecture of the Puguang intelligent gas-field project

June 2019
Shouping Wang | Xinling Peng | Qinglin Lü | Fei Long | Yiwei Jiang | Yuping Meng

During the development and construction of the Puguang Gas Field, Sichuan Basin, an advanced automatic control system and a fully covered industrial Internet of Things were built. In order to further...

A new type of casing plug effectively preventing the backflow of cement slurry

June 2019
Yunlou Liu | Xin Tang | Zheng Zhou | Bin Li | Yichao Zhang

For mitigating the hazards of slurry flowing back into the casing after liner cementing, the deficiency of slurry backflow prevention structure of current liner hangers at home and aboard was analyzed...

Technologies for the benefit development of low-permeability tight sandstone gas reservoirs in the Yan'an Gas Field, Ordos Basin

June 2019
Xiangzeng Wang | Xiangyang Qiao | Naizhe Mi | Ruogu Wang

The Yan'an Gas Field is located in the southeastern part of the Ordos Basin, and its low-permeability tight sandstone gas reservoirs are characterized by thin reservoirs, poor physical properties and...

Analysis on the weight-on-bit transmission efficiency of the static push-the-bit rotary steerable system

June 2019
Yucai Shi | Zhixiang Teng | Jing Bai | Zhichuan Guan | Qingcheng Liu | Heng Wang

Now, the static push-the-bit rotary steerable system (SRSS) developed in China is being put into field tests and primary applications. During its normal drilling, higher frictional forces generated...

Relationship between gas reservoir distribution and structural system of upper Triassic Xujiahe Fm in the Sichuan Basin

June 2019
Shu Liu | Xingguo Ren | Shengxian Yao | Ziping Liu | Meng Ning | Xin Wang | Xiaohui Huang

The gas reservoir of Upper Triassic Xujiahe Fm in the Sichuan Basin is characterized by “accumulation in the early stage, entrapment in the middle stage and activation in the late stage”. In order to...

Development characteristics and exploration potential of the Lower Carboniferous black shale in the Guizhong Depression

June 2019
Dongfeng Hu | Zhihong Wei | Ruobing Liu | Zhiwei Fan | Jing Han

The Carboniferous shale in the Guizhong Depression of central Guangxi presents good exploration potential of shale gas, but its exploration effectiveness is restricted by the unclear distribution, quality...

Decomposition characteristics of natural gas hydrates in hydraulic lifting pipelines

April 2019
Hailiang Xu | Weiyang Kong | Fangqiong Yang

For the sake of guiding parameter setting of the hydraulic lifting pipeline system for cutter-suction mining of natural gas hydrates (“hydrates” for short) on the seabed, the decomposition characteristics...

Characteristics of buried structures in northern Longmenshan mountains and its significance to oil and gas exploration in the Sichuan Basin

April 2019
Yueming Yang | Cong Chen | Long Wen | Xiao Chen | Han Liang | Ran Liu | Xu Guan | Bing Luo | Chen Xie

Since 2014, great gas discoveries have been achieved in the Upper Paleozoic Shuangyushi zone in the piedmont zone of the Longmenshan mountains, northwestern Sichuan Basin, where multiple gas wells with...

Application of the loop method to the preparation of gas reference material

April 2019
Zheng Fang | Xin Zhou | Zhi'ang Li | Fanfeng Deng | Liaoyu Dong | Liwen Zheng

High-accuracy gas reference material is an important prerequisite to guaranteeing the accuracy of stoichiometry. At present, however, the existing procedures of preparing gas reference material are...

Stress corrosion cracking behavior of X90 pipeline steel and its weld joint at different applied potentials in near-neutral solutions

April 2019
Jinheng Luo | Sheji Luo | Lifeng Li | Liang Zhang | Gang Wu | Lixia Zhu

X90 pipeline steel is a new generation of pipeline steel developed after X80 and X100 pipeline steels, and it is now a new research hotspot at home. In order to thoroughly study the effect of applied...

Laboratory experiments on blockage removing and stimulation of CBM reservoirs by composite pulsating hydraulic fracturing of radial horizontal wells

April 2019
Shouceng Tian | Zhongwei Huang | Gensheng Li | Peiqing Lu | Hongyuan Zhang | Tianyu Wang

It is a common phenomenon during CBM drilling and production that reservoir damage is not eliminated completely. In view of this, a technical idea of composite pulsating hydraulic fracturing of radial...

Damage mechanism of cement slurry to CBM reservoirs with developed fractures and cleats: A case study from eastern Yunnan and western Guizhou in China

April 2019
Hansen Sun | Chengwen Wang

The coalbed methane (CBM) reservoirs in the areas of eastern Yunnan and western Guizhou are characterized by developed cleats and fractures and low fracturing pressures, so cementing slurry (“slurry”...

Application of CBM horizontal well development technology in the roof strata close to broken-soft coal seams

April 2019
Yaobo Xu | Yushuang Zhu | Peihe Zhang

Broken coal structure and low permeability are the main reasons for the difficult production of coalbed methane (CBM) in broken-soft coal seams. In this paper, No.8 coal seam in the Luling Mine of the...

A new quantitative evaluation method for development area selection of tight gas and CBM commingled production

April 2019
Yuhu Bai

Existing evaluation methods used for the development area selection for commingled production of tight gas and coalbed methane (CBM) are poorly universal and their parameters (e.g. reserves and reservoir...

Calculation and analysis of dynamic drag and torque of horizontal well strings

April 2019
Xiaohua Zhu | Ke Li | Jiawei An

In recent years, shale gas production horizontal well types mainly include conventional horizontal well, highly deviated well and scoop-shape horizontal well. For the sake of construction decision making,...

An experimental study on oxidizer treatment used to improve the seepage capacity of coal reservoirs

April 2019
Yili Kang | Yingqian Tu | Lijun You | Xiangchen Li | Fansheng Huang

It is difficult to stimulate coal reservoirs in physical approaches, and the recovery factor of coalbed methane (CBM) can be enhanced by applying strong oxidizers through oxidation to stimulate coal...

A high-efficiency development mode of shale gas reservoirs in mountainous areas based on large cluster horizontal well engineering

April 2019
Deli Gao

With the basic characteristics of conventional horizontal wells, the so-called complex wells including horizontal extended-reach wells, multi-lateral horizontal wells, U-shaped wells, cluster horizontal...

A CBM development well type optimization method based on the long-run marginal cost

April 2019
Youjin Dai | Shiqun Li | Liangyu Xia | Jingxin Li | Yang Lü

Reasonable optimization of development well type is the prerequisite to realize the economic and effective development of coalbed methane (CBM). However, the existing CBM development well type optimization...

Effect of cross-section distortion on the performance of small-radius induction bends

January 2019
Gaofeng Wang | Zhuanzhao Yang | Yinglai Liu | Xianghui Nie | Yan Xu | Jinlan Zhao

While a small-radius induction bend is manufactured, various cross-section distortions may occur, such as its cross section tending to be elliptic, and wall thickness reduction or increase. These defects...

Logging-based identification and evaluation of karst fractures in the eastern Right Bank of the Amu Darya River, Turkmenistan

January 2019
Shudong Zhang | Xingguo Ren | Li Luo | Tingliang Guo | Xusheng Liang

Carbonate gas reservoir in the eastern area on the Right Bank of the Amu Darya River, Turkmenistan, are of low-porosity and with developed fractures. In this area, fractures control reservoir properties...

Simulation of effective fracture length of prepad acid fracturing considering multiple leak-off effect

January 2019
Lurui Dang | Changlin Zhou | Mei Huang | Desheng Jiang

For the purpose of improving the accuracy and effectiveness of acid fracturing design for carbonate reservoirs with developed natural fractures, an acidizing fluid flow and reaction model taking the...

New understanding of the sedimentary model of Lower Cambrian Longwangmiao Formation reservoirs in the Sichuan Basin

January 2019
Wei Yang | Guoqi Wei | Wuren Xie | Mancang Liu | Hui Jin | Fuying Zeng | Nan Su | Ai Sun | Juehong Shen | Shiyu Ma

Natural gas in the gas reservoirs of Lower Cambrian Longwangmiao Fm is mainly concentrated in the granular shoal facies in central Sichuan Basin, therefore the study on lithofacies paleogeography and...

Optimal selection and effect evaluation of re-fracturing intervals in shale gas horizontal wells

January 2019
Yanchao Li | Yunbin He | Jianfeng Xiao | Xiaozhi Shi | Qiang Feng | Congbin Yin

The monitoring results of production logging show that almost one third of perforation clusters produce no or less gas after volumetric fracturing is initially applied in shale gas reservoirs. Besides,...

Negative adsorption in the isotherm adsorption experiments of low-adsorption coal and shale

January 2019
Wenguang Tian | Ze Deng | Hongyan Wang | Honglin Liu | Guizhong Li | Xuejun Liu | Zhenhong Chen | Hao Chen | Yanan Li

Negative absorption of an inverse V type which rises first and then drops is often observed in the adsorption test of low adsorption samples. In view of this, a gravimetric isotherm rig with a large...

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