2024 Vol. 41, No. 5

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DRILLING FLUID
Synthesis of a Hydrate Inhibitor and Its Application in Drilling Fluids for Ultra-Deep Water Drilling
LIU Shujie, XU Yilong, ZHANG Yufei, CHU Yuekang, YUE Qiansheng, ZHAO Qingmei
2024, 41(5): 557-563. doi: 10.12358/j.issn.1001-5620.2024.05.002
Abstract(351) HTML (101) PDF (2479KB)(91)
Abstract:
In ultra-deep water drilling, the formation of natural gas hydrates aways endanger the safety of drilling and production. The development of excellent kinetic hydrate inhibitors (KHI) which are compounded with thermodynamic is of great importance to the effective inhibition of gas hydrates in ultra-...
Mechanisms of Borehole Wall Instability of Deep Coal Seam in Ordos Basin and Drilling Fluid Countermeasures
LYU Kunhong, ZHANG Hui, TIAN Deliang, YANG Boyuan, LI Jun, OUYANG Yong, AN Jintao, QIN Cheng
2024, 41(5): 564-573. doi: 10.12358/j.issn.1001-5620.2024.05.001
Abstract(381) HTML (120) PDF (3922KB)(88)
Abstract:
In response to the problem of wellbore instability in deep coal seams in the Ordos Basin, the mechanism of wellbore instability in the 8# coal reservoir of the Benxi Formation in the Nalin 1 block was revealed from the perspectives of mineral analysis, microstructure analysis, physical-chemical prop...
Synthesis and Evaluation of Modified Sulfomethylated Phenolic Resin MSP-1
ZHANG Gaobo, YANG Shuangquan, LI Peihai
2024, 41(5): 574-581. doi: 10.12358/j.issn.1001-5620.2024.05.003
Abstract(269) HTML (104) PDF (2128KB)(60)
Abstract:
This paper analyzes the status quo of the application and deficiency of the original sulfomethylated phenolic resin as a filtration reducer in water based drilling fluids. Based on the analysis, a new modified sulfomethylated phenolic resin, MSP-1, has been developed through molecular design to repl...
Study on Temperature-Controlled Liquid-Solid Phase Change Mud Loss Control System and Mud Loss Control with In-situ Self-Generated Bridging Particles
WANG Jiaqin, YANG Yanjie, ZHAO Cheng, LIU Shanghao, BAO Dan, ZHANG Peng
2024, 41(5): 582-588. doi: 10.12358/j.issn.1001-5620.2024.05.004
Abstract(252) HTML (93) PDF (3396KB)(68)
Abstract:
Mud losses into fractures are a technical difficulty frequently encountered in drilling operation. The technical bottleneck is the poor matching between the traditional bridging lost circulation materials and the sizes of the channels through which the mud is lost, and this generally leads to repeat...
A Temporary Plugging Drill-in Fluid with Highly Soluble Multilevel Bridging Particles for Carbonate Reservoir
GAO Wei, FAN Sheng, QI Biao, DAI Changlou, JIA Hu, NIU Chengcheng
2024, 41(5): 589-602. doi: 10.12358/j.issn.1001-5620.2024.05.005
Abstract(268) HTML (92) PDF (3721KB)(47)
Abstract:
The sensitivity of the carbonate reservoir in the second block of the Shunbei oilfield is evaluated through rock fracture stability correction method. In the evaluation drilling fluid samples taken from operational field were used and the results of the evaluation show that the main factors causing ...
Synthesis and Application of a Self-Degradable Polymeric Lost Circulation Material
ZHENG Wenwu, LIU Fu, ZHANG Junyi, HAN Jing, CAO Qichao, WANG Xiong, WANG Song
2024, 41(5): 603-608. doi: 10.12358/j.issn.1001-5620.2024.05.006
Abstract(275) HTML (97) PDF (2289KB)(58)
Abstract:
Oil and gas well drilling have long been faced with a technical difficulty-mud loss, and this problem still remains unresolved. Polymer gel lost circulation material (LCM), a kind of LCM commonly used today, has several deficiencies such as low pressure bearing capacity, small expansion after water ...
Lost Circulation Materials for Controlling Mud Losses while Drilling with RSS
JIA Yonghong, GUO You, ZHANG Wei, YE Anchen, GUO Chunping, HE Yinbo
2024, 41(5): 609-616. doi: 10.12358/j.issn.1001-5620.2024.05.007
Abstract(231) HTML (82) PDF (3601KB)(69)
Abstract:
In drilling operation the rotary steering system (RSS) is easy to be blocked by the lost circulation materials (LCMs), causing problems such as interruption of downhole instrument signal transmission, deviation of wellbore trajectory as well as blocking of mud circulation. Moreover, addition of conv...
Controlling Lost Circulation by Stagewise Strengthening Formation with Cementable Lost Circulation Material in Well Cha-302 Cementable
WANG Lifeng
2024, 41(5): 617-621. doi: 10.12358/j.issn.1001-5620.2024.05.008
Abstract(227) HTML (100) PDF (2065KB)(51)
Abstract:
Well Cha-302 is a key appraisal well located in a gentle slope belt structure in the south of the Songliao Basin. This well penetrated in the third interval the Yingcheng formation which is developed with tuff into which mud is easy to lose. During drilling, lost circulation was encountered several ...
CEMENTING FLUID
Extra-High Temperature High Density Cement Slurry for Cementing Liners through Salt Formation in Well Qieshen-1
XU Dawei, WANG Xiaojing, XU Chunhu, WEI Haoguang, CHANG Lianyu
2024, 41(5): 622-629. doi: 10.12358/j.issn.1001-5620.2024.05.009
Abstract(204) HTML (64) PDF (3167KB)(42)
Abstract:
The well Qieshen-1 is an exploration well deployed by Sinopec in block Tazhong in Tarim Basin. The well was drilled to a depth of 8,745.00 m in four intervals, with static bottom hole temperature being 196 ℃. Technical difficulties such as high temperature, high pressure, salt formation, narrow clea...
Development and Evaluation of a Temperature-Sensitive Deformable Fibrous Capsule Lost Circulation Material
TIAN Hui, BU Yuhuan, HU Miaomiao, SHEN Shengda, CAO Chengzhang
2024, 41(5): 630-639. doi: 10.12358/j.issn.1001-5620.2024.05.010
Abstract(223) HTML (94) PDF (4757KB)(54)
Abstract:
A temperature-sensitive deformable fibrous capsule with shape memory has been developed to address the difficulties in mixing cement slurries and the slurry thickening problem caused by the oversize and excessive dosage of the fibrous materials presently in use, such as glass fiber, polypropylene fi...
Carboxyl Functionalized Carbon Nanotube and Its Effects on Set Cement
JIA Hui, JIN Xin, WEI Haoguang, LI Xiaojiang
2024, 41(5): 640-645. doi: 10.12358/j.issn.1001-5620.2024.05.011
Abstract(159) HTML (51) PDF (2460KB)(36)
Abstract:
With the continual development of unconventional oil and gas, complex downhole conditions have presented higher requirements on the various mechanical properties of set cement for well integrity, and these requirements have urged the development of high performance nanomaterials for improving the pe...
Study on Corrosion Rate of Cement Monomineralic C2S in CO2 Geological Sequestration Environment
WANG Xiying
2024, 41(5): 646-653. doi: 10.12358/j.issn.1001-5620.2024.05.012
Abstract(205) HTML (77) PDF (2757KB)(36)
Abstract:
In geological sequestration and application of CO2, the cement used in well cementing is easy to react with CO2, an acidic gas produced downhole, causing the set cement for well cementing to be corroded and the mechanical properties of the set cement decline remarkably. Presently, the corrosion rate...
High Temperature Hydration of Low Density Cement Slurries Weighted with Hollow Microspheres
ZHAO Hu, MA Chunxu, SONG Weikai, TIAN Ye, ZOU Yiwei, SUN Chao
2024, 41(5): 654-660. doi: 10.12358/j.issn.1001-5620.2024.05.013
Abstract(189) HTML (62) PDF (3040KB)(45)
Abstract:
Hollow microspheres are made of borosilicate glass and contain in their molecules abundant SiO2. In laboratory experiment, several pieces of set cement of low density cement slurries containing hollow microspheres are tested at 120 ℃ and 150 ℃ respectively for their properties such as compressive st...
Technology for Cementing High Pressure Narrow Density Window Gas Zones in Well Dongqiu-X
ZHAO Lingxiao, WANG Chuncai, YE Sutao, ZOU Shuang, WANG Jiandong, WANG Biao
2024, 41(5): 661-667. doi: 10.12358/j.issn.1001-5620.2024.05.014
Abstract(178) HTML (56) PDF (3417KB)(45)
Abstract:
The well Dongqiu-X is an exploration well drilled in the Qiulitage tectonic zone of the Kuche sag in the Tarim Basin. The fifth interval of the well was drilled to a depth of 6,130 m with Φ215.9 mm bits and a drilling fluid of 2.17 g/cm3, and was prematurely completed at that depth. During drilling ...
FRACTUREING FLUID & ACIDIZING FLUID
A Multifunctional Sand-carrying and Oil-displacement Fracturing Fluid System Based on Physical Cross-linking
LI Jianshen, HUANG Qiushi, YAN Songbing, LIU Qing, WANG Maogong, DONG Jingfeng, ZHENG Miao
2024, 41(5): 668-676. doi: 10.12358/j.issn.1001-5620.2024.05.015
Abstract(167) HTML (56) PDF (2573KB)(33)
Abstract:
It is difficult to avoid the contradiction between the high sand-carrying capacity of fracturing fluids, the flowback and formation damage of gel breaking fluid during the shale oil extraction process. A new multifunctional sand-carrying and oil-displacement fracturing fluid system (PN-PPS), with hi...
Preparation of Corrosion Inhibitor for Self-Diverting Acid and Mechanisms of Corrosion Inhibition
CUI Bo, CHEN Jun, AI Junzhe, FENG Puyong, RONG Xinming, WANG Shun
2024, 41(5): 677-685. doi: 10.12358/j.issn.1001-5620.2024.05.016
Abstract(180) HTML (66) PDF (3883KB)(32)
Abstract:
Self-diverting acids are widely used in the acidification and fracturing of carbonate reservoirs. Corrosion inhibitors, because of the special molecular structures of the viscoelastic surfactants, have poor compatibility with other additives and corrosion control efficiency that is quite low. In thi...
Study on Temporary Plugging Diverted Acidification in Strong Heterogeneous Sandstone：A Case Study of the Silurian in Tazhong
WANG Qing, ZHOU Fujian, YANG Dandan, TAN Yanxin, YU Sen, YAO Erdong, LI Fuyuan
2024, 41(5): 686-694. doi: 10.12358/j.issn.1001-5620.2024.05.017
Abstract(177) HTML (64) PDF (6080KB)(39)
Abstract:
Acidizing constitutes a pivotal enhancement strategy for the effective exploitation of low-permeability sandstone oil reservoirs. The Silurian reservoirs in the Tarim Basin, characterized by numerous thin layers and pronounced heterogeneity, present challenges in acid treatment; specifically, acid f...

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