Research progress on isotopic fractionation in the process of shale gas/coalbed methane migration by Wenbiao LI, Shuangfang LU, Junqian LI, Yongbo WEI, Shengxian ZHAO, Pengfei ZHANG, Ziyi WANG, Xiao LI, Jun WANG

“…Furthermore, it has shown promising application potential in production status identification and decline trend prediction of gas well. Future research should focus on: (1) the co-evolution of carbon and hydrogen isotopes of different components during natural gas migration, (2) the characterization of isotopic fractionation during the whole process of gas generation-expulsion-migration-accumulation-dispersion, and (3) quantitative characterization of isotopic fractionation during natural gas migration in complex pore-fracture systems and its application.…”
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Isotopic geochemical characteristics and identification indexes of shale gas hydraulic fracturing flowback/produced water by Yunyan Ni, Limiao Yao, Jianli Sui, Jianping Chen

“…As a result, 87Sr/86Sr values measured in the Silurian strata in southern Sichuan Basin are high, which makes 87Sr/86Sr values become an effective index to distinguish shale gas fracturing FP water from conventional gas well produced water and shallow groundwater in Sichuan Basin.…”
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Prediction of marine shale gas production in South China based on drilling workload analysis by Qun Zhao, Shen Yang, Hongyan Wang, Nan Wang, Dexun Liu, Honglin Liu, Huanrong Zang

“…On this basis, the development features of foreign and domestic shale gas wells were studied and the drilling workload analytical method for the prediction of shale gas production was established: (1) the initial production of a single well can be used to characterize the productivity of the shale gas well, and its test production is approximate to its initial production. …”
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Experimental evaluation of different influencing parameters on cutting transport performance (CTP) in deviated wells by Sayed Muhammad Iqbal, Altaf Hussain, Nafees Ali, Wakeel Hussain, Hadi Hussain, Sadam Hussain, Syed Yasir Ali Shah, Edwin E. Nyakilla

“…Globally, fuel energy has become a crucial issue in fulfilling energy demand; new oil/gas wells should be drilled safely and efficiently to achieve the well target. …”
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A Method for Evaluating Coalbed Methane Reservoir Productivity Considering Drilling Fluid Damage by Chen Li, Lichun Sun, Zhigang Zhao, Jian Zhang, Yong Li, Yanjun Meng, Lei Wang

“…Compared with a conventional gas reservoir or shale gas reservoir, the working fluid loss during CBM development will seriously affect the subsequent production project and even make the gas well lose production capacity. On the other hand, in order to avoid this phenomenon, measures such as acidification or volumetric fracturing are sometimes used to improve the seepage environment near the well and near the fracture. …”
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New understandings of the seismic modes of high productivity wells in the Sinian Dengying Fm gas reservoirs in the Gaoshiti area, Sichuan Basin by Fusen Xiao, Kang Chen, Qi Ran, Xuan Zhang, Bing Xie, Xinggang Liu, Wei Xu, Wenjun Luo

“…Then, the types of reservoir assemblages were determined based on gas well logging and test data, and the seismic response characteristics of typical wells with different types of reservoir assemblages and the seismic modes of high productivity wells were studied by using high-resolution seismic data. …”
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Geochemical characteristics of shale gas hydraulic fracturing flowback/produced water in Zheng’an block, northern Guizhou Province, China by Yunyan Ni, Song Liu, Linzhi Li, Bo Zhang, Limiao Yao, Jianli Sui, Jianping Chen

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Damage of Green Synthetic Cement Slurry to Clastic Rock Reservoir by Meng Xu, Xin Tan, Libo Yang, Hanlie Cheng, David Cofell

“…As the most critical part of oil and gas well construction, the cementing process mainly pays attention to the safe pumping of the cement slurry and the long-term effective interlayer isolation capability of the cement sheath. …”
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Shale gas exploration and development in the Sichuan Basin: Progress, challenge and countermeasures by Liehui Zhang, Xiao He, Xiaogang Li, Kuncheng Li, Jiang He, Zhi Zhang, Jingjing Guo, Yinan Chen, Wenshi Liu

“…On the one hand, continue to apply the geology and engineering integration technology to carry out “integrated research, integrated design, integrated implementation and integrated iteration” in the whole life cycle of shale gas well; and on the other hand, carry out problem-oriented continuous researches from the aspects of geological evaluation, development policy, engineering technology and industry regulation, so as to improve geological evaluation theory and technology, innovate gas reservoir engineering theory and method, research and develop engineering technology for cost reduction and efficiency improvement, improve shale gas industry regulation, and form a new pattern of collaborative promotion of technical and non-technical elements. …”
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Mechanisms and prevention & control countermeasures of water breakthrough in horizontal wells in multi-layer unconsolidated sandstone gas reservoirs: A case study of the Tainan Gas... by Yun Yang, Duanyang Gu, Yunxiao Lian, Guoliang Liu, Shengmei Han, Lin Chang, Yuankun Ma, Yongnian Zhang

“…In conclusion, the edge water encroachment can be delayed and the water-free gas production period of gas well can be extended by increasing the length of horizontal section and controlling the production pressure difference. …”
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Study into impacts of formation sands on foam performance during drainage gas production—Take Qinghai Oilfield’s Sebei Gasfield for example by Nan Li, Weidong Jiang, Yixin Jiang, Jinmin Yang, Guangqiang Cao, Rui Zheng, Daqiang Feng, Haoyu Wang, Zhiyu Xu, Bin Peng, Furong Li, Ruixin Kang, Qiubo Wu

“…Foam drainage gas production is a gas production technology for low-pressure gas well in domestic and abroad industries. In Qinghai Oilfield’s Sebei Gasfield, sand existence often occurs during drainage production. …”
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Helium distribution of Dongsheng gas field in Ordos Basin and discovery of a super large helium-rich gas field by Faqi HE, Fubin WANG, Jie WANG, Yanrong ZOU, Chuan AN, Xiaoyong ZHOU, Liangbang MA, Yongqiang ZHAO, Jin ZHANG, Dimin LIU, Haijian JIANG

“…The variation of helium content with gas well production performance in short and medium term of key natural gas wells in the Dongsheng gas field showed that the helium contents in natural gases are stable in a relatively long term. …”
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Hydraulic fracturing effect of CBM vertical well and its impact on productivity: a case study of Yaojie Mining Area by Daibing MA, Lichao CHEN

“…CBM reservoir is a typical fracture-controlled gas reservoir, and the scale of fracturing and fracture-filling effect have decisive control on gas well productivity. In order to reveal the influence mechanism of the hydraulic fracturing effect of CBM vertical wells on the productivity effect of gas wells, taking the Haishiwan Mining Area of Yaojie, Gansu as an example, this paper focuses on reporting the fracturing effect of coal reservoirs under the form of vertical well development and its understanding of the constraints on productivity. the result shows: ① The fracture pressure of CBM well mainly feeds back the characteristics of the wellbore cement sheath rather than the mechanical properties of the coal reservoir. …”
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Natural gas development prospect in Changqing gas province of the Ordos Basin by He Jiangchuan, Yu Haojie, He Guanghuai, Zhang Ji, Li Ya

“…And twenty-six development technological countermeasures are put forward correspondingly, such as well pattern thickening, extension and reserve increase, secondary production layer potential tapping and fine gas well management. Third, the development direction and goal of natural gas development in Changqing gas province is to pay equal attention to the stable production of old gas fields and the production increase of new areas and carry out conventional gas and unconventional gas research simultaneously. …”
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Xenon isotope systematics, giant impacts, and mantle degassing on the early Earth by Pepin, R, Porcelli, D

“…A single event that degassed both the MORB and gas well reservoirs at the time of the moon-forming collision would be compatible with their distinct 129Xerad/136Xe244 ratios only if the post-impact iodine abundance in the MORB reservoir was about an order of magnitude lower than current estimates. …”

EFFECT OF THE PSEUDOTIME FUNCTION ON GAS RESERVOIR DRAINAGE AREA DETERMINATION Efecto de la función de pseudotiempo en la determinación del área de drene de un yaciemiento de gas... by Freddy-Humberto Escobar, Aura-María López, José-Humberto Cantillo

“…In this paper, we implemented the Tiab’s Direct Synthesis (TDS) technique, to include pseudotime effects, and observe its influence on the interpretation results of gas well test data at early and late time periods. …”
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Improving gas fixation in acetogenic bacteria by Emerson, David Frederic.

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Ten years of gas shale fracturing in China: Review and prospect by Jinzhou Zhao, Lan Ren, Tingxue Jiang, Dongfeng Hu, Leize Wu, Jianfa Wu, Congbin Yin, Yongming Li, Yongquan Hu, Ran Lin, Xiaogang Li, Yu Peng, Cheng Shen, Xiyu Chen, Qing Yin, Changgui Jia, Yi Song, Haitao Wang, Zhaoyuan Li, Jianjun Wu, Bin Zeng, Linlin Du

“…The first fractured shale gas well of China was constructed in 2010. After 10 years of development, China has become the second country that possesses the core technology of shale gas development around the world, realized the shale gas fracturing techniques from zero to one and from lagging to partially leading, and constructed the fracturing theory and technology system suitable for middle–shallow marine shale gas exploitation. …”
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Uniform Circular-Array-Based Borehole Pulsed Eddy-Current System for Asymmetry Defect Inspection in Downhole Casings by Ling Yang, Bo Dang, Zhiping Ren, Changzan Liu, Jingxin Dang, Yang Zhao, Baixin An, Ruirong Dang

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Synthesized Transmitting Coil for Magnetic Focusing of Pulsed Eddy Current for Downhole Casing Inspection by Ling Yang, Changzan Liu, Jingxin Dang, Yang Zhao, Bo Dang, Ruirong Dang

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