吉木萨尔页岩油井区CO2前置压裂工艺参数优化及现场实践

doi:10.13809/j.cnki.cn32-1825/te.2024.01.012

Abstract

Abstract:

The shale oil of Lucaogou Formation in Jimsar Sag has the characteristics of extremely low original permeability and high viscosity of crude oil, making it uneconomical to produce under natural conditions. Field practices have demonstrated that dense drilling combined with high-intensity volume fracturing is one of the most effective means to achieve large-scale development of shale oil. However, how to slow down the decline rate of oil wells and improve the recovery rate per well remains a pressing issue to be addressed. From 2019 to 2022, the researches and field tests of CO₂pre-fracturing assisted production technology were carried out in Jimsar shale oil block. The application effect of CO₂ pre-storage fracturing and CO₂ huff and puff in Jimsar shale oil block was systematically studied and analyzed. The results indicate that supercritical CO₂ has the effects of miscible energy increase, dissolution to improve reservoir conditions, improve imbibition replacement efficiency, and increase the complexity of fracture network. The optimal injection volume, injection speed, and injection methods were determined, and a preliminary technological system for CO₂ pre-fracturing in shale oil reservoirs was established. According to the prediction of production data, the CO₂ pre-fracturing process can increase the final recovery rate by about 20%, which provides a reference for realizing the benefit development of shale oil and improving the development effect of other types of shale reservoirs.

Key words: CO₂ pre-energizing fracturing, reservoir modification, crack propagation law, parameter optimization, Jimsar shale oil

CLC Number:

TE357

Kun ZHAO,Zeyang LI,Juanli LIU, et al. Parameter optimization and field practice of CO₂ pre-fracturing process in Jimsar shale oil block[J]. Petroleum Reservoir Evaluation and Development, 2024, 14(1): 83-90.

Figures/Tables 11

Fig. 1

Fig. 2

Table1

Fig. 3

Fig. 4

Table 2

Fig. 5

Fig. 6

Fig. 7

Table 3

Fig. 8

References 27

[1]	徐长贵, 邓勇, 范彩伟, 等. 北部湾盆地涠西南凹陷页岩油地质特征与资源潜力[J]. 中国海上油气, 2022, 34(5): 1-12.
	XU Changgui, DENG Yong, FAN Caiwei, et al. Geological characteristics and resource potential of shale oil in Weixinan sag of Beibu Gulf Basin[J]. China Offshore Oil and Gas, 2022, 34(5): 1-12.
[2]	陈浩, 张超, 徐程浩, 等. 基于支持向量机的致密油藏水平井体积压裂初期产能预测[J]. 中国海上油气, 2022, 34(1): 102-109.
	CHEN Hao, ZHANG Chao, XU Chenghao, et al. Support vector machine-based initial productivity prediction for SRV of horizontal wells in tight oil reservoirs[J]. China Offshore Oil and Gas, 2022, 34(1): 102-109.
[3]	苏畅, 赵刚, 鹿克峰, 等. 压裂井产量递减典型曲线图版的建立及应用[J]. 中国海上油气, 2022, 34(3): 82-90.
	SU Chang, ZHAO Gang, LU Kefeng, et al. Establishment of production decline typical curve plates for fractured well and their applications[J]. China Offshore Oil and Gas, 2022, 34(3): 82-90.
[4]	VERDON J P, KENDALL J M, MAXWELL S C. A comparison of passive seismic monitoring of fracture stimulation from water and CO₂injection[J]. Geophysics, 2010, 75(3): MA1-MA7.
[5]	ISHIDA T, AOYAGI K, NIWA T, et al. Acoustic emission monitoring of hydraulic fracturing laboratory experiment with supercritical and liquid CO₂[J]. Geophysical Research Letters, 2012, 39(16): 16309.
[6]	MIDDLETON R S, CAREY J W, CURRIER R P, et al. Shale gas and non-aqueous fracturing fluids: Opportunities and challenges for supercritical CO₂[J]. Applied Energy, 2015, 147(3): 500-509. doi: 10.1016/j.apenergy.2015.03.023
[7]	王猛, 王海柱, 李根生, 等. 超临界CO₂压裂缝内携砂数值模拟[J]. 石油机械, 2018, 46(11): 72-78.
	WANG Meng, WANG Haizhu, LI Gensheng, et al. Numerical study of proppant transport with supercritical CO₂ in fracture[J]. Petroleum Machinery, 2018, 46(11): 72-78.
[8]	ZHANG X W, LU Y Y, TANG J R, et al. Experimental study on fracture initiation and propagation in shale using supercritical carbon dioxide fracturing[J]. Fuel, 2017, 190: 370-378. doi: 10.1016/j.fuel.2016.10.120
[9]	霍进, 何吉祥, 高阳, 等. 吉木萨尔凹陷芦草沟组页岩油开发难点及对策[J]. 新疆石油地质, 2019, 40(4): 379-388.
	HUO Jin, HE Jixiang, GAO Yang, et al. The development difficulties and countermeasures of shale oil in Lucaogou Formation of Jimsar Sag[J]. Xinjiang Petroleum Geology, 2019, 40(4): 379-388.
[10]	吴宝成, 李建民, 邬元月, 等. 准噶尔盆地吉木萨尔凹陷芦草沟组页岩油上甜点地质工程一体化开发实践[J]. 中国石油勘探, 2019, 24(5): 679-690. doi: 10.3969/j.issn.1672-7703.2019.05.014
	WU Baocheng, LI Jianmin, WU Yuanyue, et al. Characteristics and main controls of shale oil reservoirs in Lucaogou Formation, Jimsar Sag, Junggar Basin[J]. China Petroleum Exploration, 2019, 24(5): 679-690. doi: 10.3969/j.issn.1672-7703.2019.05.014
[11]	陈晨, 朱颖, 翟梁皓, 等. 超临界二氧化碳压裂技术研究进展[J]. 探矿工程(岩土钻掘工程), 2018, 45(10): 21-26.
	CHEN Chen, ZHU Ying, ZHAI Lianghao, et al. Research progress of supercritical carbon dioxide fracturing technology[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling), 2018, 45(10): 21-26.
[12]	易勇刚, 黄科翔, 李杰, 等. 前置蓄能压裂中的CO₂在玛湖凹陷砾岩油藏中的作用[J]. 新疆石油地质, 2022, 43(1): 42-47.
	YI Yonggang, HUANG Kexiang, LI Jie, et al. Effect of CO₂ pre-pad in volume fracturing of conglomerate reservoirs in Mahu Sag, Junggar Basin[J]. Xinjiang Petroleum Geology, 2022, 43(1): 42-47.
[13]	苏玉亮, 王程伟, 李蕾, 等. 致密油藏CO₂前置压裂流体相互作用机理[J]. 科学技术与工程, 2021, 21(8): 3076-3081.
	SU Yuliang, WANG Chengwei, LI Lei, et al. Behavior of CO₂ pre-fracturing fluid in tight reservoir[J]. Science Technology and Engineering, 2021, 21(8): 3076-3081.
[14]	邹雨时, 李彦超, 李四海. CO₂前置注入对页岩压裂裂缝形态和岩石物性的影响[J]. 天然气工业, 2021, 41(10): 83-94.
	ZOU Yushi, LI Yanchao, LI Sihai. Influence of CO₂ pre-injection on fracture mophology and the petrophysical properties in shale fracturing[J]. Natural Gas Industry, 2021, 41(10): 83-94.
[15]	袁钟涛, 杨胜来, 张政, 等. 特低渗油藏注CO₂吞吐适应性评价及规律模拟[J]. 非常规油气, 2022, 9(5): 85-92.
	YUAN Zhongtao, YANG Shenglai, ZHANG Zheng, et al. Adaptability evaluation and regular simulation of CO₂ injection huff and puff in ultra-low permeability reservoirs[J]. Unconventional Oil & Gas, 2022, 9(5): 85-92.
[16]	钱坤, 杨胜来, 窦洪恩, 等. 注CO₂过程中流体性质变化及驱油机理实验研究[J]. 石油科学通报, 2019, 4(1): 69-82.
	QIAN Kun, YANG Shenglai, DOU Hong’en, et al. Interaction of the CO₂-oil system and displacement mechanisms during CO₂ flooding[J]. Petroleum Science Bulletin, 2019, 4(1): 69-82.
[17]	李菊花, 王洁, 梁成钢, 等. 新疆吉木萨尔页岩油藏注CO₂驱最小混相压力的确定[J]. 长江大学学报(自然科学版), 2022, 19(5): 37-44.
	LI Juhua, WANG Jie, LIANG Chenggang, et al. Determination of minimum miscible pressure of CO₂ flooding in Jimsar shale reservoir of Xinjiang[J]. Journal of Yangtze University(Natural Science Edition), 2022, 19(5): 37-44.
[18]	王海柱, 李根生, 郑永, 等. 超临界CO₂压裂技术现状与展望[J]. 石油学报, 2020, 41(1): 116-126. doi: 10.7623/syxb202001011
	WANG Haizhu, LI Gensheng, ZHENG Yong, et al. Research status and prospects of supercritical CO₂ fracturing technology[J]. Acta Petrolei Sinca, 2020, 41(1): 116-126. doi: 10.7623/syxb202001011
[19]	马涛, 汤达祯, 蒋平, 等. 注CO₂提高采收率技术现状[J]. 油田化学, 2007, 24(4): 379-383.
	MA Tao, TANG Dazhen, JIANG Ping, et al. The status of enhanced oil recovery by CO₂ injection[J]. Oilfield Chemistry, 2007, 24(4): 379-383.
[20]	刘小波. CO₂混相驱技术在特低渗透滩坝砂油藏的开发实践及效果评价[J]. 油气地质与采收率, 2020, 27(3): 113-119.
	LIU Xiaobo. Application and evaluation of CO₂ miscible flooding in extra-low permeability beach-bar sand reservoirs[J]. Petroleum Geology and Recovery Efficiency, 2020, 27(3): 113-119.
[21]	张海龙. CO₂混相驱提高石油采收率实践与认识[J]. 大庆石油地质与开发, 2020, 39(2): 114-119.
	ZHANG Hailong. Practice and understanding of enhanced oil recovery by CO₂ miscible flooding[J]. Petroleum Geology & Oilfield Development in Daqing, 2020, 39(2): 114-119.
[22]	孟照峰. 超临界二氧化碳钻井井壁岩石特性研究[J]. 石油机械, 2022, 50(7): 49-54.
	MENG Zhaofeng. Study on rock characteristics of borehole wall during supercritical crbon dioxide drilling[J]. Petroleum Machinery, 2022, 50(7): 49-54.
[23]	卢义玉, 廖引, 汤积仁, 等. 页岩超临界CO₂压裂起裂压力与裂缝形态试验研究[J]. 煤炭学报, 2018, 43(1): 175-180.
	LU Yiyu, LIAO Yin, TANG Jiren, et al. Experimental study on fracture initiation pressure and morphology in shale using supercritical CO₂ fracturing[J]. Coal Journal, 2018, 43(1): 175-180.
[24]	苗芷芃, 吴涛, 张荣军, 等. 致密油体积压裂复杂缝网形成规律数值模拟研究[J]. 石油机械, 2022, 50(12): 96-102.
	MIAO Zhipeng, WU Tao, ZHANG Rongjun, et al. Numerical simulation on formation law of complex fracture network by volume fracturing in tight oil reservoir[J]. China Petroleum Machinery, 2022, 50(12): 96-102.
[25]	杨延增, 聂俊, 叶文勇, 等. 二氧化碳压裂供液系统设计[J]. 钻采工艺, 2020, 43(4): 75-77. doi: 10.3969/J. ISSN.1006-768X.2020.04.21
	YANG Yanzeng, NIE Jun, YE Wenyong, et al. Design of liquid supplying system in carbon dioxide fracturing[J]. Drilling & Production Technology, 2020, 43(4): 75-77. doi: 10.3969/J. ISSN.1006-768X.2020.04.21
[26]	王鹏涛, 吴向阳, 朱杰, 等. 二氧化碳前置蓄能体积压裂优化设计[J]. 当代化工, 2021, 50(2): 447-450.
	WANG Pengtao, WU Xiangyang, ZHU Jie, et al. Optimization design of volume fracturing with carbon dioxide pre-storage[J]. Contemporary Chemical Industry, 2021, 50(2): 447-450.
[27]	王高峰, 廖广志, 李宏斌, 等. CO₂驱气机理与提高采收率评价模型[J]. 油气藏评价与开发, 2022, 12(5): 734-740.
	WANG Gaofeng, LIAO Guangzhi, LI Hongbin, et al. Mechanism and calculation model of EOR by CO₂ flooding[J]. Petroleum Reservoir Evaluation and Development, 2022, 12(5): 734-740.

样品编号	地层温度/ ℃	地层压力/ MPa	饱和压力/MPa	气油比/（m³/t）	驱替速度/ （mL/min）
A	89.2	39.3	5.6	20	0.2
B	98.1	44.4	5.8	23	0.2
C	82.8	36.7	3.3	14	0.2

层位	样品深度/m	岩性	黏土矿物含量/ %	常见非黏土矿物含量/%
层位	样品深度/m	岩性	黏土矿物含量/ %	石英	钾长石	斜长石	方解石	铁白云石
芦草沟组上“甜点”	3 146.54	砂质砂屑云岩	1.79	10.34		26.88	5.17	55.82
芦草沟组下“甜点”	3 264.65	白云质砂屑砂岩	0.91	10.32		17.55		71.22
	6 267.19	泥质粉砂岩	1.91	14.77	12.66	42.19	21.09	7.38
	3 300.17	云质粉砂岩	3.22	13.35	11.12	38.93	3.34	30.04

井号	工艺参数
井号	油藏中部深度/m	水平段长度/m	油层钻遇率/m	改造段长度/m	簇间距/m	总液量/m³	总砂量/m³	加砂强度/（m³/m）
试验井A	3 810	1 510	90.00	1 433	15.9	42 608.7	2 900	2.0
对比井B	3 663	2 012	76.38	2 012	15.1	59 377.2	4 050	2.0
对比井C	3 563	2 015	96.18	1 300	15.3	35 615.6	2 710	2.1
对比井D	3 471	1 540	63.73	982	14.7	29 015.0	1 980	2.0

Parameter optimization and field practice of CO₂ pre-fracturing process in Jimsar shale oil block

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 11

References 27

Related Articles 8

Metrics

Comments

Recommended 0

[1]	CAO Xiaopeng, LIU Haicheng, LI Zhongxin, CHEN Xianchao, JIANG Pengyu, FAN Hao. Optimization of huff-n-puff in shale oil horizontal wells based on EDFM [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(5): 734-740.
[2]	LI Zhongchao, QI Guixue, LUO Bobo, XU Xun, CHEN Hua. Gas flooding adaptability of deep low permeability condensate gas reservoir [J]. Petroleum Reservoir Evaluation and Development, 2024, 14(3): 324-332.
[3]	CHENG Xiaojun. Enhanced oil recovery and parameter optimization of hydrocarbon injection in fractured-cavity reservoirs [J]. Petroleum Reservoir Evaluation and Development, 2022, 12(6): 902-909.
[4]	LIU Penggang,SUN Tianli,CHEN Wei,HOU Xiaozhi,HUANG Yuanhe,ZHU Guo,HE Hai,FANG Bin. Analysis and optimization of influencing factors of negative pressure stripping desulfurization process for sour water in Yuanba gas field [J]. Reservoir Evaluation and Development, 2020, 10(4): 125-129.
[5]	JIN Zhongkang,WANG Zhilin,MAO Chaoqi. Dominant mechanism and application of CO₂ immiscible flooding in M block with low permeability [J]. Reservoir Evaluation and Development, 2020, 10(3): 68-74.
[6]	Feng Xiang,Gong Ruxiang,Li Jinsong. Optimization method for injection intensity of multi thermal fluid huff and puff in multiple cycles [J]. Reservoir Evaluation and Development, 2019, 9(1): 64-67.
[7]	Cao Weijia,Lu Xiangguo,Zhang Yunbao,Xu Guorui,Li Xiang. Study on water plugging effect and mechanism of starch graft copolymer gel [J]. Reservoir Evaluation and Development, 2019, 9(1): 44-50.
[8]	Lai Jianlin,Fang Qilong,Gao Yingyun,Wei Wei. Research and application of integral network-fracturing of coal-bed methane of southern Yanchuan [J]. Reservoir Evaluation and Development, 2018, 8(3): 79-82.

Parameter optimization and field practice of CO2 pre-fracturing process in Jimsar shale oil block

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 11

References 27

Related Articles 8

Metrics

Comments

Recommended 0

Parameter optimization and field practice of CO₂ pre-fracturing process in Jimsar shale oil block