2020 Vol. 37, No. 2

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2020, 37(2)
Abstract(345) PDF (1055KB)(102)
Abstract:
FORUM
Micro Foam Drilling Fluid Technology Abroad: New Progress and Discussion
WANG Chaoqun, CHEN Yuanbo, ZHAO Zhiqiang, GUO Xiaoxuan, ZHANG Daoming
2020, 37(2): 133-139. doi: 10.3969/j.issn.1001-5620.2020.02.001
Abstract(1004) PDF (1116KB)(232) [Cited by] (7)
Abstract:
This paper summarizes progress made abroad on researches and application of micro foam drilling fluid in recent decade, including knowledge obtained about the micro mechanisms and rheology of micro foam drilling fluids. The authors present in the paper that, for the current technical status of the m...
DRILLING FLUID
Experimental Study on Shale Borehole Wall Stability of Tight Oil Wells in Daqing Oilfield
YAN Songbing, LIU Fuchen, YANG Zhenzhou, LIU Yonggui, LYU Meng, SONG Tao, ZHOU Chun
2020, 37(2): 140-147. doi: 10.3969/j.issn.1001-5620.2020.02.002
Abstract(830) PDF (10901KB)(189) [Cited by] (5)
Abstract:
Borehole wall instability has long been a problem in drilling the Qingshankou Formation and the Quantou Formation in the tight oil blocks in Daqing. Common methods of evaluating the stability of shale formations presently in use are hot rolling test and linear expansion test. These methods however, ...
Development and Working Mechanism of Flow Pattern Enhancer for Synthetic Base Drilling Fluids
HAN Zixuan
2020, 37(2): 148-152. doi: 10.3969/j.issn.1001-5620.2020.02.003
Abstract(748) PDF (6768KB)(205) [Cited by] (11)
Abstract:
A flow pattern enhancer has been developed to deal with the rheology problem of synthetic base drilling fluids at low temperatures. In laboratory experiment, the effects of the flow pattern enhancer on the rheology of water-in-oil emulsion were measured, the IR and XRD characteristics of the flow pa...
Rheology Control and Application of Ultra-High-Density Compound Brine Drilling Fluid
HUANG Tao, FAN Xiangsheng, TAO Weidong, XIE Gangjin
2020, 37(2): 153-159. doi: 10.3969/j.issn.1001-5620.2020.02.004
Abstract(886) PDF (2181KB)(239) [Cited by] (9)
Abstract:
Well Lu-206 is an appraisal well drilled in the oil/gas and shale gas exploration block in Changning, Lu County, south of Sichuan Basin. The target zone of this well is the Baota Formation. The vertical pilot hole of this well is 4082 m in depth. During drilling operation, high pressure fracture gas...
The Effect of Temperature on Stability of Borehole Wall in Ultra-Deep Fractured Formation
LU Yunhu, XIAO Xianheng, ZHAO Lin, JIN Yan, CHEN Mian
2020, 37(2): 160-167. doi: 10.3969/j.issn.1001-5620.2020.02.005
Abstract(740) PDF (2090KB)(191) [Cited by] (13)
Abstract:
Formation temperature plays a significant role in stability of the surrounding rock around the borehole wall, especially for the ultra-deep (> 6000 m) fractured reservoirs. Traditional prediction model on collapse pressure that considers temperature effect mainly applies to intact formation, wher...
Study on Temperature and Pressure Correction Model for Predicting Liquid Phase Density of Drilling Fluids
LI Xu, REN Shengli, LIU Wencheng, ZHAO Danhui, LIAO Maolin, LIN Liming
2020, 37(2): 168-173. doi: 10.3969/j.issn.1001-5620.2020.02.006
Abstract(628) PDF (8696KB)(107) [Cited by] (6)
Abstract:
The density of a drilling fluid is the main factor affecting the pressure distribution along the wellbore. An accurate calculation of the density of a drilling fluid is the key to the avoidance of well kick, blowout and mud losses. Since liquid phase in drilling fluid has densities changing with pre...
Drilling Fluid Technology for Exploration and Development of Shale Oil in South of Dagang Oilfield
LI Guanghuan, LONG Tao, ZHOU Tao, SONG Jianming, HUO Baoyu, LI Yanqiao
2020, 37(2): 174-179. doi: 10.3969/j.issn.1001-5620.2020.02.007
Abstract(1347) PDF (1931KB)(205) [Cited by] (6)
Abstract:
Wellbore instability is a problem encountered in shale oil horizontal drilling in Cangdong block in the south of Dagang oilfield. To address this problem, the geological features of the Cangdong block, the operation difficulties and the mechanisms of borehole wall collapse were analyzed, and three k...
Study on Environmentally Friendly Easy-to-destabilize Drilling Fluid Technology
JIANG Zhuo, CAO Yanfeng, WANG Jian, XING Xijin, SHU Fuchang, XIANG Xingjin
2020, 37(2): 180-184. doi: 10.3969/j.issn.1001-5620.2020.02.008
Abstract(696) PDF (956KB)(142) [Cited by] (3)
Abstract:
The discharge of waste drilling fluids in offshore drilling operations has in recent years gradually become "zero discharge" from "limited discharge" implemented originally because of the stricter requirement of environment protection. This has resulted in sharp increase in the amount of waste drill...
Patterns of Stress Sensitivity of the Shale Oil Reservoirs in Raoyang Depression
WANG Xiuying, WU Tong, CAI Jun, XIONG Zhan, GUO Guangfeng, ZHANG Ming
2020, 37(2): 185-191. doi: 10.3969/j.issn.1001-5620.2020.02.009
Abstract(1082) PDF (1433KB)(141) [Cited by] (4)
Abstract:
The Raoyang depression is enriched with abundant shale oil. It is well known that shale formations are generally developed with stress sensitivity, therefore the degree of stress sensitivity in this area should be measured and patterns of stress sensitivity be found to provide basic data for field p...
Treatment of Aluminum Sulphate Contamination to Water Base Drilling Fluids
ZHU Xuefei, XI Yunfei, YOU Wei
2020, 37(2): 192-195. doi: 10.3969/j.issn.1001-5620.2020.02.010
Abstract(671) PDF (1273KB)(215) [Cited by] (1)
Abstract:
A high density KCl-polymer sulfonate drilling fluid was used to drill the third interval (φ311.2 mm) of the well KS-19. When drilling between 6243 m and 6387 m, the drilling fluid was contaminated by industrial waste water containing aluminum sulphate. The drilling fluid was experiencing rheology in...
Optimization of Drilling Fluid Density for Shale Gas Drilling in Block Wei-202 and Block Wei-204
BAI Guobin
2020, 37(2): 196-201. doi: 10.3969/j.issn.1001-5620.2020.02.011
Abstract(778) PDF (6066KB)(218) [Cited by] (4)
Abstract:
With the extensive growth of shale gas development in the south of Sichuan Province, downhole problems and reservoir damage are becoming more and more frequent. Optimization of the density of the drilling fluids, which is too high for reservoir protection, is a problem that needs to be urgently reso...
CEMENTING FLUID
Ultra-high Temperature Cement Slurry for Cementing Well GR1 Penetrating Hot Dry Rock Formations in Gonghe Basin, Qinghai
LIU Huibin, LI Jianhua, PANG Heshan, ZHENG Huikai, LIU Dongqing, SUN Xinghua, SONG Weibin
2020, 37(2): 202-208. doi: 10.3969/j.issn.1001-5620.2020.02.012
Abstract(1476) PDF (3295KB)(182) [Cited by] (10)
Abstract:
The job quality of well cementing is the key factor affecting the borehole quality of a well penetrating hot dry rock formations. The major technical difficulties in cementing the wells penetrating hot dry rock formations in the Gonghe Basin in Qinghai were determined by studying the geological char...
Synthesis and Performance of High Temperature Filter Loss Reducer ZFA-1 for Oil Well Cement Slurries
LI Xiaolan, ZHENG Zhijun, GUO Peng
2020, 37(2): 209-213,220. doi: 10.3969/j.issn.1001-5620.2020.02.013
Abstract(1194) PDF (4092KB)(168) [Cited by] (12)
Abstract:
Water-soluble polymers have limited temperature resistance in high pH environment. To improve the high temperature performance of filter loss reducers, a new high temperature filter loss reducer, ZFA-1, was developed using a quite different way of synthesis than conventional way of synthesizing wate...
Managed Pressure Well Cementing Techniques for Wells with Narrow Safe Drilling Windows in Sichuan Basin
LIU Yang, CHEN Min, WU Lang, XIAN Ming, YANG Xiangyu
2020, 37(2): 214-220. doi: 10.3969/j.issn.1001-5620.2020.02.014
Abstract(966) PDF (4919KB)(238) [Cited by] (17)
Abstract:
The Sichuan Basin is characterized by complex geological structures. Take the Chuanxi area (West Sichuan) as an example, wells drilled in this area have depth of at least 7000 m, and the safe drilling windows are only 0.05-0.08 g/cm3. Losses of cementing slurry have been frequently encountered, reve...
Explore and Study on Well Cementing Anti-Water-Channeling Self-Healing Agent
XIN Haipeng, WU Dahua, ZHANG Minghui, DENG Qiang, WANG Jianyao, ZENG Jianguo
2020, 37(2): 221-225. doi: 10.3969/j.issn.1001-5620.2020.02.015
Abstract(942) PDF (2142KB)(156) [Cited by] (6)
Abstract:
An anti-water-channeling self-healing agent has been developed to deal with channeling in annular spaces after well cementing. This anti-water-channeling self-healing agent has a core-shell structure, it uses highly water absorbent resin as the core material and the size of the core (a sample passin...
Laboratory Study on Leak-Proof Early Strength Tough Cement Surry
LYU Bin, ZHOU Chenyang, QIU Aimin, LI Bo, ZHANG Ye, YANG Xuesong
2020, 37(2): 226-231. doi: 10.3969/j.issn.1001-5620.2020.02.016
Abstract(1186) PDF (1673KB)(144) [Cited by] (3)
Abstract:
In some old oilfields such as Daqing, Changqing and Kelamayi, shallow burial of oil and gas, low bottom hole temperature, long-term wide use of stimulation measures such as water injection, complex geological structure of the reservoirs, as well as mutual interference of different pressure systems, ...
Technology for Cementing Shale Oil Reservoirs in Dagang Oilfield: Study and Application
LI Xiaolin, WU Chaoming, ZHAO Shuxun, LIN Zhihui, WANG Guifu, LING Yong, WANG Lang
2020, 37(2): 232-238. doi: 10.3969/j.issn.1001-5620.2020.02.017
Abstract(837) PDF (2116KB)(140) [Cited by] (11)
Abstract:
Cementing of the shale oil reservoir section in Dagang oilfield has encountered several difficulties such as complex formation pressure system, active oil and gas, poor compatibility between the potassium salt drilling fluid and the cement slurry, difficulty in displacing drilling fluid mixed with o...
Technology for Cementing Directional Wells Drilled for Salt Cavern Gas Storages in Jintan
JIA Jianchao, SHAN Baodong, AN Guoyin, YU Wanbao, WANG Yuanqing, LI Xiaoming, LIAO Hualin
2020, 37(2): 239-243. doi: 10.3969/j.issn.1001-5620.2020.02.018
Abstract(887) PDF (1227KB)(151)
Abstract:
To improve the utilization of salt rock resources, the second stage of the Phase 2 gas storage construction in Jintan used directional cluster well instead of vertical well previously used to build the gas storages. Cluster well gas storage helps maximize the storage capacity and gas production rate...
FRACTURING FLUID & ACIDIZING FLUID
Optimization of a High Temperature Low Corrosivity Acid Fluid for Application at 180℃ High Temperature
HE Shiyun
2020, 37(2): 244-249. doi: 10.3969/j.issn.1001-5620.2020.02.019
Abstract(750) PDF (1727KB)(128) [Cited by] (6)
Abstract:
A new high temperature corrosion inhibitor has been developed though molecular structure design and synthesis to deal with problems encountered in high temperature deep well acidification, such as high bottom hole temperature and corrosion of downhole string and downhole tools. The corrosion inhibit...
A New Supercritical CO2 Fracturing Fluid Containing Silicon Thickener: It's Rheological Property and Core Damage Evaluation
XU Liu, FU Meilong, HUANG Qian, WANG Jie, ZHAO Zhongcong
2020, 37(2): 250-256. doi: 10.3969/j.issn.1001-5620.2020.02.020
Abstract(964) PDF (3092KB)(249) [Cited by] (6)
Abstract:
A silicon thickener has been developed to deal with the problems that supercritical CO2 fracturing fluid is faced with, such as low viscosity and poor sand carrying capacity. The rheological properties and core damage of supercritical CO2 fracturing fluid were studied to provide a reference for the ...
Application of Diversion through Broadband Temporary Plugging Multi-Fracture Fracturing Technology in Sulige Gas Field
HAN Fuyong, NI Pan, MENG Hailong
2020, 37(2): 257-263. doi: 10.3969/j.issn.1001-5620.2020.02.021
Abstract(796) PDF (2325KB)(159) [Cited by] (10)
Abstract:
To improve the reliability of insulating multi fractures for staged fracturing job in horizontal well completion operation such as open-hole sliding sleeve-packer completion and casing cementing well completion as well as bridge plug segmented multi-cluster fracturing, temporary plugging agents were...
COMPLETION FLUID
Anti-Corrosion Behavior of TC4 Alloy In Organic Salt Completion Fluid
ZHAO Guoxian, GAO Fei
2020, 37(2): 264-268. doi: 10.3969/j.issn.1001-5620.2020.02.022
Abstract(1003) PDF (1547KB)(135) [Cited by] (10)
Abstract:
Aiming at applicability of titanium alloy in harsh oilfield environment, the corrosion resistance and electrochemical corrosion behavior of TC4 titanium alloy in high temperature and high pressure completion fluid were studied with simulated corrosion weightlessness test and electrochemical test ana...

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