2017 Vol. 34, No. 1

Display Method:
2017, 34(1)
Abstract:
Progresses in Studying Drilling Fluid Nano Material Plugging Agents
MA Chengyun, SONG Bitao, XU Tongtai, PENG Fangfang, SONG Taotao, LIU Zuoming
2017, 34(1): 1-8. doi: 10.3969/j.issn.1001-5620.2017.01.001
Abstract(2410) PDF (2528KB)(793) [Cited by] (53)
Abstract:
This paper analyzes the mechanisms under which the hard and brittle shale formations destabilize, introduces the characteristics and application of nano materials, and summarizes the progresses made in the studies of drilling fluid nano material plugging agents, including organic and inorganic nano ...
Experimental Study on a New Ultrahigh Temperature Shale Inhibitor
ZHANG Xin, QIU Zhengsong, ZHONG Hanyi, TANG Zhichuan, XU Jiangen, ZHANG Daoming
2017, 34(1): 9-15. doi: 10.3969/j.issn.1001-5620.2017.01.002
Abstract:
Study on high temperature shale inhibitors is of great importance in satisfying the needs of high temperature deep well drilling and in improving the inhibitive capacity of high temperature water base drilling fluids. A new ultrahigh temperature shale inhibitor, HT-HIB, was studied for its high temp...
Plugging Micro-fractures to Prevent Gas-cut in Fractured Gas Reservoir Drilling
HAN Zixuan, LIN Yongxue, CHAI Long, LI Daqi
2017, 34(1): 16-22. doi: 10.3969/j.issn.1001-5620.2017.01.003
Abstract(1507) PDF (2831KB)(638) [Cited by] (15)
Abstract:
The Ordovician carbonate rock reservoirs drilled in Tazhong area (Tarim Basin) have complex geology and developed fractures, 50% of which with widths between 20 μm and 400 μm. These fractures have led to frequent lost circulation, well kick and severe gas cut, which in turn resulted in well control ...
Study on Enhancing Borehole Wall Stability by Micro Emulsion
ZHANG Jinghui
2017, 34(1): 23-27. doi: 10.3969/j.issn.1001-5620.2017.01.004
Abstract:
Mud shales have plenty of micro-fractures which are difficult to plug and seal. Mud filtrates infiltrate swiftly deep into the formation under the action of osmotic pressure, capillary force and differential chemical potential, causing the formation to become unstable. A micro emulsion has been deve...
Study of Hydrophobic Inhibitive Water Base Drilling Fluid System and Application in Shale Gas Well
JING Minjia, TAO Huaizhi, YUAN Zhiping
2017, 34(1): 28-32. doi: 10.3969/j.issn.1001-5620.2017.01.005
Abstract:
A hydrophilically inhibitive water base drilling fluid has been developed to drill shale gas wells penetrating the Longmaxi Formation. This drilling fluid was formulated with a hydrophilically inhibitive agent CQ-SIA and a high performance lubricant CQLSA. CQ-SIA, the core additive of the formulatio...
Synthesis and Application of a Comb Polymer Filter Loss Reducer in Deep Well Saltwater Drilling Fluid
XU Yunbo, LAN Qiang, ZHANG Bin, CHEN Jian, SUN Dejun
2017, 34(1): 33-38. doi: 10.3969/j.issn.1001-5620.2017.01.006
Abstract:
A comb polymer filter loss reducer, DMP-1, was synthesized through solution polymerization with allyl polyoxyethylene ether 400 (APEG400), acrylamide (AM), and 2-acrylamido-2-methyl propane sulfonic acid (AMPS). DMP-1 was developed in an effort to overcome the deficiencies of presently available hig...
Development and Application of High Performance Drilling Fluid Bridging Formation Stabilizer
ZHANG Xianmin, JIANG Guancheng, XUAN Yang, FU Jianguo, DONG Wei
2017, 34(1): 39-44. doi: 10.3969/j.issn.1001-5620.2017.01.007
Abstract:
Borehole wall destabilization has long been a problem that needs to be solved. A high temperature bridging formation stabilizer QFT, has been developed based on the working mechanism under which formation stabilizers are adsorbed on clay particles and formation minerals. Monomers used in synthesizin...
A New Method of Simulating Micro Fractures in Shale and Plugging Evaluation Experiment
YANG Juesuan, HOU Jie
2017, 34(1): 45-49. doi: 10.3969/j.issn.1001-5620.2017.01.008
Abstract:
There are many methods available presently for the simulation of micro fractures in Shale. All these methods have limitations, and are unable to trulysimulate the hydration and dispersion processes of shales in contact with water at HTHP conditions. To solve this problem, several simulation methods,...
Analysis of the Mechanism of Hydrophobically Associating Polymer used as LCM while Drilling
JIANG Guancheng, LIU Chong, HE Yinbo, JIANG Qihui, WANG Chunlei, GE Qingying, ZHAO Li
2017, 34(1): 50-53,59. doi: 10.3969/j.issn.1001-5620.2017.01.009
Abstract(1060) PDF (2614KB)(306) [Cited by] (15)
Abstract:
A hydrophobically associating polymer, JD, has been synthesized with long chain alkyl dimethyl allyl ammonium chloride, acrylamide, N-vinyl pyrrolidone and acrylic acid in a certain ratio of initiators and a certain polymerization condition. JD was developed to deal with the difficulties in plugging...
Research on Safe Drilling Technology for Ultra Deep Ultrahigh Pressure Saltwater Zones in Piedmont Area, Kuche
ZHOU Jian, JIA Hongjun, LIU Yongwang, LI Weidong, DENG Qiang, YANG Yanming
2017, 34(1): 54-59. doi: 10.3969/j.issn.1001-5620.2017.01.010
Abstract:
Wells drilled in the piedmont area in Kyche, Xinjiang have to penetrate thick salt and gypsum formations, which have complex geology, ultrahigh pressure saltwater with poor distribution patterns in length and breadth, highly varied formation pressures that are difficult to predict. Drilling fluid pr...
Effects of Acid and Base Types on pH Controlled Reversible Emulsion
LIU Fei, WANG Yanling, GUO Baoyu, WANG Xudong, ZHANG Yue
2017, 34(1): 60-64. doi: 10.3969/j.issn.1001-5620.2017.01.011
Abstract:
By changing external conditions, reversible emulsion can vary between oil-in-water emulsion and water-in-oil emulsion to play a better role that is expected. Studies have been conducted on the preparation and stability of reversible emulsions and the effects of acid and base types on them. The studi...
Trajectory Optimization of Extended Reach Well to Widen Safe Drilling Window
SHEN Haichao, ZHANG Huawei, LIU Chang, WANG Jianning
2017, 34(1): 65-69. doi: 10.3969/j.issn.1001-5620.2017.01.012
Abstract:
Extended reach well technology has been used to produce the natural gas in the offshore area from onshore in developing the Block S located in the east of Sakhalin, Russia. The designed well depth (MD) was 12,000 m (TVD 2,800 m) and the horizontal displacement was about 11,000 m. The ratio of horizo...
Drilling Fluid Technology for Deepwater HTHP Well
HU Wenjun, CHENG Yusheng, LI Huaike, XIANG Xiong, YANG Honglie, XIONG Yong
2017, 34(1): 70-76. doi: 10.3969/j.issn.1001-5620.2017.01.013
Abstract:
Well LS25-1S-1 is a deep water HTHP well drilled to 4 448 m, completed at the Meishan Formation. A six-interval well profile was adopted during drilling. The predicted pressure coefficient of the φ212.7 mm target section was 1.70-1.84. Narrow safe drilling window, blowout, lost circulation and the f...
Application of Oil Base Drilling Fluids in Donghai Gas Field
ZHU Sheng
2017, 34(1): 77-82. doi: 10.3969/j.issn.1001-5620.2017.01.014
Abstract:
The target zones of the Donghai gas field are the Huagang Formation and the Pinghu Formation, whose formation characteristicssuch as poorly cemented sandstone-mudstone interbeds, fractured mud stone and developed coalbeds, are unfavorable to drilling operation. Unstable borehole wall and poor hole c...
Effects of Different Types of Weighting Agents on the Performance of Oil Base Drilling Fluids
YUE Chaoxian, XIONG Hanqiao, SU Xiaoming, ZHUANG Yan, XU Peng
2017, 34(1): 83-86. doi: 10.3969/j.issn.1001-5620.2017.01.015
Abstract:
The success of oil and gas well drilling depends to a large extent on the performance of drilling fluid, whichis greatly affectedby the weighting agent used. A drilling fluid weighted with different weighting agents will perform quite differently during drilling. In laboratory studies, a micron powd...
Analysis of Reservoir Protection Mechanism by Direct Drilling Fluid Flowback
ZHANG Weiguo, XU Mingbiao, YOU Fuchang
2017, 34(1): 87-91. doi: 10.3969/j.issn.1001-5620.2017.01.016
Abstract:
Horizontal well open hole completion is a way of well completion to maximize well production rate. In offshore drilling, well completion is generally done with solids-free drill-in fluid, supplemented with gel-breaking well completion. Direct flowback of drill-in fluid is a technology developed on t...
Treatment and use of Waste Drilling Fluid with Existing Solids Control Equipment
HU Zubiao, WANG Qingchen, CHEN Tingting
2017, 34(1): 92-95. doi: 10.3969/j.issn.1001-5620.2017.01.017
Abstract:
Waste drilling fluids in Changqing gas field are treated with gel-breaking and solid-liquid separation technologies to conform to the environment protection requirements. In gel-breaking the drilling fluids, a new gel-breaking agent, CQPJ-1, was developed to replace the single-purpose, slow and low-...
A Solution to the Improvement of the Quality of Cement Sheath-formation Bonding Based on Geopolymer Theory
BU Yuhuan, ZHAO Letian, WANG Chunyu
2017, 34(1): 96-100. doi: 10.3969/j.issn.1001-5620.2017.01.018
Abstract:
Mud cakes left over on the borehole wall by drilling fluid play a major role in determining the quality of the bonding between cement sheath and formation. Solidification of mud cakes provides a new clue for solving the bonding problem. A new idea of mud cake solidification based on the geopolymer p...
AMPS/DMAM/FA-A Graft Copolymer Humic Acid Fluid Loss Reducer for Well Cementing
SONG Weikai, WANG Qingshun, HOU Yawei, WANG Lei, TIAN Ye, ZHAO Jun
2017, 34(1): 101-105. doi: 10.3969/j.issn.1001-5620.2017.01.019
Abstract:
A high temperature cement slurry fluid loss reducer, G85L, was synthesized with 2-acrylamido-2-methyl propane sulfonic acid (AMPS), N,N-dimethylacrylamide (DMAM) and fumaric acid (FA) through radical polymerization under the following conditions:AMPS:DMAM:FA=1:0.38:0.08, mass ratio of total monomers...
Cement Sheath Integrity: Simulation and Measures for Improvement at High Temperature Deep Well Conditions
LI Ning, DU Jianbo, AI Zhengqing, GUO Xiaoyang, LIU Jian, ZHANG Kai
2017, 34(1): 106-111. doi: 10.3969/j.issn.1001-5620.2017.01.020
Abstract:
One of the most important purposes of cement sheath study is to establish experimental apparatus and procedure for evaluating the integrity of cement sheath. The working load of cement sheath in a wellbore can be simulated on an artificial cement sheath using equivalent stress method. With the help ...
Analysis of High Temperature Strength Retrogression of High Water/Cement Ratio Set Cement with Silica Powder
FU Junfang
2017, 34(1): 112-115. doi: 10.3969/j.issn.1001-5620.2017.01.021
Abstract:
It has been found in laboratory experiment that, a low-density cement slurry of 1.65 g/cm3 (containing 40% sized silica powder) prepared by increasing water/cement ratio to 0.74, had its compressive strength reduced by 20.3%, and the strength measured by ultrasonic method reduced by 50.6% after agin...
Synthesis and Study of an AM/AA/SMA Hydrophobically Associating Polymer Used as Thickening Agent in Fracturing Fluids
ZHAO Qingmei, ZHAO Lin, MA Chao
2017, 34(1): 116-121. doi: 10.3969/j.issn.1001-5620.2017.01.022
Abstract:
Hydrophobically associating polymers have found wide applications in oil and gas production because of their unique rheology, high temperature stability and good shear-resistance. A hydrophobically associating polymer HAPAM has recently been synthesized in laboratory with stearyl methacrylate (SMA) ...
2017, 34(1): 121-121.
Abstract:
Guar Gum Fracturing Fluids Weighted with Formates
REN Zhanchun
2017, 34(1): 122-126. doi: 10.3969/j.issn.1001-5620.2017.01.023
Abstract:
In fracturing formations with higher fracture pressures, high-density fracturing fluids should be used because low-density ones have difficulties fracturing these formations. Weighting agents for use in fracturing fluids should have good water solubility because the fracturing fluids will go deep in...