缝洞型油藏一井多靶分段压裂开发效果数值模拟

doi:10.7657/XJPG20230610

摘要/Abstract

摘要：

为了研究缝洞型油藏一井多靶分段压裂开发效果，基于离散缝洞模型，建立了考虑基质—裂缝渗流和溶洞自由流耦合的缝洞型油藏油水两相流动模型及数值模拟方法，分析了天然裂缝发育程度、底水及压裂簇数对开发效果的影响。结果表明：在无底水条件下，天然裂缝发育程度仅影响采油速度，对累计产油量影响很小；在有底水条件下，底水沿天然裂缝上升会驱替溶洞中原油，产油量会随天然裂缝密度增大而升高；溶洞尺寸和压裂裂缝对缝洞型油藏产能具有显著影响；当天然裂缝发育程度较高时，每段一簇和多簇压裂裂缝开发效果差异明显减小，即采用一簇压裂裂缝便可控制整个缝洞甜点区域。

关键词: 缝洞型油藏, 一井多靶, 分段压裂, 数值模拟, 天然裂缝, 离散裂缝, 溶洞自由流, 压裂设计

Abstract:

Based on the discrete fractured-vuggy reservoir model, an oil-water two-phase flow model and a numerical simulation method considering matrix-fracture flow and vug free flow were established to analyze the performance of one-hole multi-target staged fracturing in fractured-vuggy reservoirs, and the impacts of natural fracture development degree, bottom water, and number of fracturing clusters on the fracturing performance were identified. The results show that, in the absence of bottom water, the natural fracture development degree only affects production rate but has a minor impact on the ultimate oil recovery; and in the presence of bottom water, the bottom water rising along natural fractures displaces the crude oil in cavities, leading to an increase in oil production with the increase of natural fracture density. Vug size and hydraulic fractures significantly affect the productivity of fractured-vuggy reservoirs. When natural fractures are highly developed, the difference between the performance of fracturing by single cluster in one stage and by multiple clusters in one stage decreases significantly, indicating that a single cluster hydraulic fracture can effectively control the entire sweet spot area in the fractured-vuggy reservoir.

Key words: fractured-vuggy reservoir, one-hole multi-target, staged fracturing, numerical simulation, natural fracture, discrete fracture, vug free flow, fracturing design

中图分类号:

TE344

耿宇迪, 刘礼军, 王立静, 郭天魁. 缝洞型油藏一井多靶分段压裂开发效果数值模拟[J]. 新疆石油地质, 2023, 44(6): 711-719.

GENG Yudi, LIU Lijun, WANG Lijing, GUO Tiankui. Numerical Simulation of One-Hole Multi-Target Staged Fracturing in Fractured-Vuggy Reservoirs[J]. Xinjiang Petroleum Geology, 2023, 44(6): 711-719.

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参考文献 24

[1]	李阳. 塔河油田碳酸盐岩缝洞型油藏开发理论及方法[J]. 石油学报, 2013, 34(1):115-121.
	LI Yang. The theory and method for development of carbonate fractured-cavity reservoirs in Tahe oilfield[J]. Acta Petrolei Sinica, 2013, 34(1):115-121. doi: 10.7623/syxb201301013
[2]	田军, 王清华, 杨海军, 等. 塔里木盆地油气勘探历程与启示[J]. 新疆石油地质, 2021, 42(3):272-282.
	TIAN Jun, WANG Qinghua, YANG Haijun, et al. Petroleum exploration history and enlightenment in Tarim basin[J]. Xinjiang Petroleum Geology, 2021, 42(3):272-282.
[3]	郎晓玲, 郭召杰, 刘红岐. 井震结合在缝洞识别和预测中的应用研究[J]. 西南石油大学学报(自然科学版), 2014, 36(4):12-20.
	LANG Xiaoling, GUO Zhaojie, LIU Hongqi. Combination of well logging with seismic data in the identification and prediction of fracture and caves[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2014, 36(4):12-20.
[4]	巫波, 杨文东, 吕晶, 等. 塔河油田缝洞型储集层类型综合识别[J]. 新疆石油地质, 2023, 44(2):238-244.
	WU Bo, YANG Wendong, LYU Jing, et al. Comprehensive identification of fractured-vuggy reservoirs in Tahe oilfield[J]. Xinjiang Petroleum Geology, 2023, 44(2):238-244.
[5]	胡文革. 塔河碳酸盐岩缝洞型油藏开发技术及攻关方向[J]. 油气藏评价与开发, 2020, 10(2):1-10.
	HU Wenge. Development technology and research direction of fractured-vuggy carbonate reservoirs in Tahe oilfield[J]. Reservoir Evaluation and Development, 2020, 10(2):1-10.
[6]	焦方正. 塔里木盆地深层碳酸盐岩缝洞型油藏体积开发实践与认识[J]. 石油勘探与开发, 2019, 46(3):552-558. doi: 10.11698/PED.2019.03.13
	JIAO Fangzheng. Practice and knowledge of volumetric development of deep fractured-vuggy carbonate reservoirs in Tarim basin,NW China[J]. Petroleum Exploration and Development, 2019, 46(3):552-558.
[7]	吕爱民. 碳酸盐岩缝洞型油藏油藏工程方法研究:以塔河油田为例[D]. 山东青岛: 中国石油大学(华东), 2007.
	LÜ Aimin. Study of reservoir engineering methods for fractured-vuggy carbonate reservoirs:Tahe oilfield as an example[D]. Qingdao,Shandong: China University of Petroleum (East China), 2007.
[8]	杨学文, 汪如军, 邓兴梁, 等. 超深断控缝洞型碳酸盐岩油藏注水重力驱油理论探索[J]. 石油勘探与开发, 2022, 49(1):116-124. doi: 10.11698/PED.2022.01.10
	YANG Xuewen, WANG Rujun, DENG Xingliang, et al. Theoretical exploration of water injection gravity flooding oil in ultra-deep fault-controlled fractured-cavity carbonate reservoirs[J]. Petroleum Exploration and Development, 2022, 49(1):116-124.
[9]	李阳, 金强, 钟建华, 等. 塔河油田奥陶系岩溶分带及缝洞结构特征[J]. 石油学报, 2016, 37(3):289-298. doi: 10.7623/syxb201603001
	LI Yang, JIN Qiang, ZHONG Jianhua, et al. Karst zonings and fracture-cave structure characteristics of Ordovician reservoirs in Tahe oilfield,Tarim basin[J]. Acta Petrolei Sinica, 2016, 37(3):289-298. doi: 10.7623/syxb201603001
[10]	何成江, 姜应兵, 文欢, 等. 塔河油田缝洞型油藏“一井多控”高效开发关键技术[J]. 石油钻探技术, 2022, 50(4):37-44.
	HE Chengjiang, JIANG Yingbing, WEN Huan, et al. Key technologies for high-efficiency one-well multi-control development of fractured-vuggy reservoirs in Tahe oilfield[J]. Petroleum Drilling Techniques, 2022, 50(4):37-44.
[11]	邓兴梁, 罗新生, 刘永福, 等. 缝洞型碳酸盐岩定容油藏形成机理及开发技术[J]. 新疆石油地质, 2019, 40(1):79-83.
	LUO Xinsheng, LIU Yongfu, et al. Forming mechanism and development measures of constant-volume fractured-vuggy carbonate oil reservoirs[J]. Xinjiang Petroleum Geology, 2019, 40(1):79-83.
[12]	HUANG Z Q, GAO B, ZHANG X Y, et al. On the coupling of two-phase free flow and porous flow[C]. ECMOR XV-15th European Conference on the Mathematics of Oil Recovery. Amsterdam:EAGE, 2016:1-23.
[13]	XIE Haojun, LI Aifen, HUANG Zhaoqin, et al. Coupling of two-phase flow in fractured-vuggy reservoir with filling medium[J]. Open Physics, 2017, 15(1):12-17. doi: 10.1515/phys-2017-0002
[14]	宋世瀚, 邸元, 刘中春, 等. 离散缝洞网络油水两相流动的数值模拟[J]. 浙江科技学院学报, 2017, 29(3):172-177.
	SONG Shihan, DI Yuan, LIU Zhongchun, et al. Numerical simulation of oil-water two-phase flow in the discrete fracture-vug network[J]. Journal of Zhejiang University of Science and Technology, 2017, 29(3):172-177.
[15]	崔书岳, 邸元. 缝洞型油藏基于重力分异假定的数值模拟[J]. 应用基础与工程科学学报, 2020, 28(2):331-341.
	CUI Shuyue, DI Yuan. Numerical simulation of fractured-vuggy reservoir based on assumption of gravity segregation[J]. Journal of Basic Science and Engineering, 2020, 28(2):331-341.
[16]	LIU Lijun, HUANG Zhaoqin, YAO Jun, et al. An efficient hybrid model for 3D complex fractured vuggy reservoir simulation[J]. SPE Journal, 2020, 25(2):907-924. doi: 10.2118/199899-PA
[17]	LIU Lijun, HUANG Zhaoqin, YAO Jun, et al. Simulating two phase flow and geomechanical deformation in fractured karst reservoirs based on a coupled hydro-mechanical model[J]. International Journal of Rock Mechanics and Mining Sciences, 2021, 137:104543. doi: 10.1016/j.ijrmms.2020.104543
[18]	YAO Jun, HUANG Zhaoqin, LI Yajun, et al. Discrete fracture-vug network model for modeling fluid flow in fractured vuggy porous media[R]. SPE 130287,2010.
[19]	HUANG Zhaoqin, YAO Jun, LI Yajun, et al. Numerical calculation of equivalent permeability tensor for fractured vuggy porous media based on homogenization theory[J]. Communications in Computational Physics, 2011, 9(1):180-204. doi: 10.4208/cicp.150709.130410a
[20]	HUANG Zhaoqin, YAO Jun, WANG Yueying. An efficient numerical model for immiscible two-phase flow in fractured karst reservoirs[J]. Communications in Computational Physics, 2013, 13(2):540-558. doi: 10.4208/cicp.160711.240212a
[21]	ABDASSAH D, ERSHAGHI I. Triple-porosity systems for representing naturally fractured reservoirs[J]. SPE Formation Evaluation, 1986, 1(2):113-127. doi: 10.2118/13409-PA
[22]	贾冉, 聂仁仕, 刘勇, 等. 缝洞型油藏斜井三孔双渗试井分析模型[J]. 新疆石油地质, 2022, 43(5):606-611.
	JIA Ran, NIE Renshi, LIU Yong, et al. Tri-porosity and dual-permeability well test analysis model for inclined wells in fractured-vuggy reservoirs[J]. Xinjiang Petroleum Geology, 2022, 43(5):606-611.
[23]	姚军, 黄朝琴, 王子胜, 等. 缝洞型油藏的离散缝洞网络流动数学模型[J]. 石油学报, 2010, 31(5):815-819. doi: 10.7623/syxb201005020
	YAO Jun, HUANG Zhaoqin, WANG Zisheng, et al. Mathematical model of fluid flow in fractured vuggy reservoirs based on discrete fracture vug network[J]. Acta Petrolei Sinica, 2010, 31(5):815-819.
[24]	姚军, 刘礼军, 孙海, 等. 复杂裂缝性致密油藏注水吞吐数值模拟及机制分析[J]. 中国石油大学学报(自然科学版), 2019, 43(5):108-117.
	YAO Jun, LIU Lijun, SUN Hai, et al. Numerical simulation and mechanism analysis of water huff and puff process in complex fractured tight oil reservoirs[J]. Journal of China University of Petroleum (Edition of Natural Science), 2019, 43(5):108-117.