2020 Vol. 37, No. 6

CONTENT
2020, 37(6)
Abstract:
2020, 37(6): 809-812.
Abstract:
FORUM
New Progresses Made in the Study of Minimizing Damage to Oil and Gas Reservoirs with Micronized Manganese Ore Weighting Agent
LIU Fengbao, WU Xingxing, XU Tongtai, WANG Wei, WANG Danbin
2020, 37(6): 677-684. doi: 10.3969/j.issn.1001-5620.2020.06.001
Abstract:
Barite used in drill-in fluids causes damage to the reservoir formations and the permeability impaired by the damage is quite difficult to recover. Micromax, a new acid soluble micronized manganese ore weighting agent, has recently been used in drill-in fluids. This paper summarizes the effects of M...
Dissolution of Barite Filter Cake Using Chelating Agents: A review of Mechanisms, Diagnosis and Removal Strategies
WEI Zhongjin, ZHOU Fengshan, XU Tongtai
2020, 37(6): 685-693. doi: 10.3969/j.issn.1001-5620.2020.06.002
Abstract(6839) PDF (5710KB)(4374) [Cited by] (9)
Abstract:
As a weighting agent of drilling fluid, barite is easy to migrate, transform and precipitate in the reservoir to form acid insoluble barite mud cake, which causes serious damage to oil and gas reservoir. Therefore, it is necessary to remove the blockage of barite safely and reliably. However, many r...
DRILLING FLUID
Study and Application of an Ultra-High Temperature High Density Drilling Fluid
LI Xiong, DONG Xiaoqiang, JIN Junbin, YANG Xiaohua
2020, 37(6): 694-700. doi: 10.3969/j.issn.1001-5620.2020.06.003
Abstract:
Most of the high-density drilling fluids weighted with barite are often faced with high temperature problems such as difficulty in rheology control, high HTHP filter loss and barite sag etc. A drilling fluid design clue is presented to deal with these problems. An ultra-high temperature high density...
Oil Base Drilling Fluid Technology for Drilling Broken Ordovician Formation in Shunbei Block
WU Xiongjun, LIN Yongxue, SONG Bitao, JIN Junbin, DONG Xiaoqiang
2020, 37(6): 701-708. doi: 10.3969/j.issn.1001-5620.2020.06.004
Abstract:
Several ultra-deep wells were drilled in the Shunbei Block with water base drilling fluids, resulting in borehole wall collapse and mud losses in the Ordovician formation. Based on the analyses of the mechanisms of borehole wall collapse, a Gemini type high temperature emulsion stabilizer and a bran...
Application of a High Temperature High Density Oil Base Drilling Fluid in Well Dabei-12X in Tarim Oilfield
ZHAO Wen, SUN Qiang, ZHANG Heng
2020, 37(6): 709-714,720. doi: 10.3969/j.issn.1001-5620.2020.06.005
Abstract:
The Well Dabei-12X, located at the east high of the Dabei 12# structure in the Kuche depression, is a high temperature high pressure (HTHP) appraisal well drilled in Tarim oilfield in 2018. This well penetrated the gypsum and salt zones of the Kumugeliemu formation (4267-5287 m) in which high pressu...
Evaluation and Field Application of Weighting Agents for Ultra-High Density Oil Base Drilling Fluids
LIU Zheng, LI Juncai, XU Xinniu
2020, 37(6): 715-720. doi: 10.3969/j.issn.1001-5620.2020.06.006
Abstract:
The pressure coefficient of the Paleogene, Cretaceous and Jurassic systems in the south rim of the Junggar Basin is in a range of 2.40-2.65 g/cm3. An ultra-high density oil base drilling fluid with excellent performance is in urgent need to ensure safe drilling in this area. Using environmental scan...
Laboratory Study on Water in Oil Drilling Fluid Formulated with Biodiesel Oil
LUO Xuwu, ZHAO Xionghu, YU Jiashui, LIU Junyu, CAO Jiajun, HE Gang
2020, 37(6): 721-725. doi: 10.3969/j.issn.1001-5620.2020.06.007
Abstract:
Biodiesel, mainly composed of fatty acid alkyl esters, is a good base fluid for making ester-base drilling fluid because of its many advantages, such as high closed-cup flashing point (thus can avoid catching fire), no or a small amount of sulfur and aromatic hydrocarbons contents, stable properties...
Research and Development of a Novel Internal Rigid External Soft Plugging Agent
XU Zhe, SUN Jinsheng, LYU Kaihe, LIU Jingping, HOU Delin, KE Can, SUN Yuanwei
2020, 37(6): 726-730. doi: 10.3969/j.issn.1001-5620.2020.06.008
Abstract:
Rigid plugging agents have high strength and are difficult to adapt themselves to the sizes and shapes of the formation pores; Soft plugging agents, on the other hand, have strong self-adaptive capacity, but their compressive strength is low. Effective and efficient plugging cannot be obtained by th...
Evaluation on the Ability of a New Self-Degrading Lost Circulation Agent to Plug Fractures and Protect Reservoirs
YE Lian, QIU Zhengsong, CHEN Xiaohua, ZHONG Hanyi, ZHAO Xin, BAO Dan
2020, 37(6): 731-736. doi: 10.3969/j.issn.1001-5620.2020.06.009
Abstract(1036) PDF (3014KB)(111) [Cited by] (15)
Abstract:
When drilling in fractured reservoirs, consideration has to be given to both the plugging of the fractures to control mud losses and the removal of the plugging agents after completion of the well. Conventional temporary plugging agents do not degrade by itself and do not have enough strength to wit...
The Properties of an Environmentally Friendly High Temperature Salt Resistant Micrometer and Nanometer Filter Loss Reducer
WANG Yanling, JIANG Baoyang, LAN Jincheng, MENG Lingtao, XU Ning, LI Qiang
2020, 37(6): 737-741. doi: 10.3969/j.issn.1001-5620.2020.06.010
Abstract:
Presently there are fewer environmentally friendly high temperature salt resistant filter loss reducers available in China, and the molecular structure of the filter loss reducers are also quite simple. In our studies, MND-1, a new environmentally friendly high temperature salt-resistant micrometer ...
Study and Application of “All-in-One Bag” Multi-Function Drilling Fluids
HE Ruibing, LAI Quanyong, XU Jie, XIU Haimei, CHEN Zenghai
2020, 37(6): 742-745,752. doi: 10.3969/j.issn.1001-5620.2020.06.011
Abstract:
A new environmentally friendly multi-function drilling fluid additive PF-MFA was synthesized through dispersion polymerization. PF-MFA can be used as viscosifier, gelling agent, shale encapsulator, shale inhibitor and filter loss reducer. A new “all-in-one bag” drilling fluid was formulated with PF-...
Study and Application of Drilling Fluid Technology for Slim Hole Drilling in Changqing Gas Field
WANG Qingchen, ZHANG Jianqing, HU Zubiao, WANG Weiliang, SHI Deyi, WEI Yan
2020, 37(6): 746-752. doi: 10.3969/j.issn.1001-5620.2020.06.012
Abstract:
Mud loses, formation ballooning, borehole wall destabilization, difficulty in cuttings carrying and low success rate of wireline logging are problems encountered in slim hole drilling in the Changqing gas field. Technical measures have been taken to solve these problems. For example, reasonable flow...
Laboratory Study on Temperature Sensitive Gel Lost Circulation Material
ZHANG Kun, WANG Leilei, SU Jun, MA Hong, LI Yonglong, XUE Yongbo, LIU Yanqing
2020, 37(6): 753-756. doi: 10.3969/j.issn.1001-5620.2020.06.013
Abstract:
Gel lost circulation materials (LCM) currently in use have some deficiencies such as poor gelling controllability and weak structural strength at high temperatures. To deal with these problems, a temperature sensitive gel lost circulation material (LCM) BZWNJ was developed with Curdlan gum. Laborato...
CEMENTING FLUID
A Well Cementing Slurry Used in Arctic Permafrost
ZHANG Fuming, QI Ying, CHEN Xiaohua, MA Xiaokang, CUI Xinsen
2020, 37(6): 757-762. doi: 10.3969/j.issn.1001-5620.2020.06.014
Abstract:
Petroleum exploration and development in the Arctic area in recent years has been accelerating. Well cementing operation in this area has long been facing with ultra-low temperature (-9 ℃) and the precious time available for operation; the cement slurry is required to have strength development in 24...
A Failure Criterion of Oil Well Set Cement Based on Porous Media Theory
DING Jiadi, SHEN Jiyun, ZHANG Shuo, JI Hongfei, WANG Linlin
2020, 37(6): 763-770. doi: 10.3969/j.issn.1001-5620.2020.06.015
Abstract:
Set cement is a porous medium comprising cement skeleton and pores. When becoming solidified after hydration, the set cement in a well still has free water in its pores, and the free water is connected with fluid in the formations. Hence, the mechanical behavior of a set cement is influenced by the ...
A Cementing Slurry Used in Alternating Ultra-High Temperatures
ZHANG Hong, YANG Yan, YU Wenyan, LI Lukuan, ZHANG Xingguo
2020, 37(6): 771-776. doi: 10.3969/j.issn.1001-5620.2020.06.016
Abstract:
Alternating ultra-high temperatures in heavy oil thermal producers have significant effects on the mechanical performance of set cement. In developing a high temperature cement slurry, XRD, TG nitrogen adsorption and SEM were used to study the effects of metakaolin and graphite on the compressive st...
Effects of Physical Properties of SiO2 Crystalline State on Mechanical Properties of High Temperature Set Cement
GENG Chenzi, YAO Xiao, DAI Dan, LI Xuenian, JIANG Tao, YAN Lianguo, WU Xuechao
2020, 37(6): 777-783. doi: 10.3969/j.issn.1001-5620.2020.06.017
Abstract:
The decline of the high temperature mechanical properties of set cement in oil wells has significant influences on the safety of deep reservoirs and the life span of the wells. Studies on the decline patterns of set cement’s high temperature strengths help to improve the long-term high temperature m...
FRACTURING FLUID & ACIDIZING FLUID
Study on Controllable Slick Water Based on Stimulus Response Strategy
LI Yuanzhao, LI Ting, WANG Li, DAI Shanshan
2020, 37(6): 784-788. doi: 10.3969/j.issn.1001-5620.2020.06.018
Abstract:
In some areas with complicated geological conditions, low porosity, low permeability and low formation pressures, tough problems such as gas reservoirs developed with micron and nanometer sized pores, narrow pore throats, high displacement pressures and poor connectivity etc. are often encountered, ...
Research and Application of FHG Fracturing Fluid
Wang Muqun, Wu Guodong, Yao Xuyang, Zhou Xingwang, Maieryemuguli·Anwaier
2020, 37(6): 789-793. doi: 10.3969/j.issn.1001-5620.2020.06.019
Abstract:
In order to meet the requirements of continuously mixing fracturing fluid of volume fracturing for horizontal wells and alleviate the shortage of HPG, the paper studied the FHG fracturing fluid. Through the fineness classification and surface treatment of guar gum, it could quickly disperse and hydr...
Study on Weighted Slick Water Fracturing Fluid for Deep Buried Oil and Gas
WANG Liwei, YANG Jingxu, GAO Ying, YANG Zhanwei, TENG Qi, HAN Xiuling, XU Minjie
2020, 37(6): 794-797,802. doi: 10.3969/j.issn.1001-5620.2020.06.020
Abstract:
In fracturing the ultradeep gas reservoirs in the piedmont structure in Kuche, Tarim Basin, 75% of the wells were operated at pump pressures above 100 MPa, the highest pump pressure being 136 MPa. The development of the gas reservoirs has long been limited by the fracturing operation because of the ...
Study on Dynamic Characteristics of Acid Rock Reaction and Acid Fracturing Countermeasures in Complex Heterogeneous Carbonate Reservoirs
ZHONG Xiaojun, ZHANG Rui, WU Gang, YIN Zheng, WANG Xiaochao, LU Hao, GAO Yuebin
2020, 37(6): 798-802. doi: 10.3969/j.issn.1001-5620.2020.06.021
Abstract:
Different from the domestic and overseas large seam hole type carbonate reservoir, northern Langgu depression Yangshuiwu buried hill in Jizhong depression has its own unique characters such as high buried depth, high temperature, low permeability, dense reservoir spaces and strong heterogeneity. Und...
COMPLETION FLUID
A High Temperature Block Removal Fluid for Offshore Application
MA Shuangzheng, ZHANG Yaoyuan, ZHANG Guochao, WANG Guanxiang, CHEN Jinding, NAN Yuan, LI Yuankui
2020, 37(6): 803-808. doi: 10.3969/j.issn.1001-5620.2020.06.022
Abstract:
The sandstone reservoir penetrated by the well X-1 in an offshore oilfield has the characteristics of high temperature, abnormally high pressure and low permeability. Dissolution pores are developed in the reservoir rocks. Intergranular fractures in the reservoir rocks are full of various kinds of c...