缝洞型油藏不同岩溶背景注采关系优化研究

doi:10.13809/j.cnki.cn32-1825/te.2020.02.006

摘要/Abstract

摘要：

针对缝洞型油藏单元注水中油井单向受效为主、易沿主通道快速推进,导致水驱储量有效控制和高效动用程度低的难题,采用了物模和数值模拟的方法,分析了不同岩溶背景下缝洞结构分布和水驱开发效果的关系,形成了基于缝洞空间分布的差异化注采关系。研究认为：风化壳岩溶采取构造低部位注水、高部位采油,储集体不发育区注水、发育区采油,建立一注多采的注采关系;断控岩溶在平面上次级断裂区注水、主干断裂区采油,纵向上断裂深部注水、浅层采油,形成立体注采的注采关系;古暗河岩溶的主暗河段实施主干暗河段注水、分支暗河采油,多套暗河实施深部暗河注水、浅层暗河采油,构建分层注采的注采关系。缝洞型油藏不同岩溶背景下注采关系的建立为实现空间结构井网水驱控制储量最大化奠定重要的基础。

关键词: 注采关系, 空间结构井网, 缝洞结构, 缝洞型油藏, 塔河油田

Abstract:

In the fractured-vuggy reservoir unit, the water injection mainly affects the oil well unidirectionally and is easy to advance rapidly along the main channel, leading to the problems of difficult to effective control the water drive reserves and low efficient production. By the methods of physical model and numerical simulation, the relation between the structure of fracture/cave and the development effect of water flooding in different karst background is analyzed, and the differential injection-production relation based on the spatial distribution of fracture/cave is formed. The results show that: in the crust karst reservoirs, the mode of water injection in the low part and oil production in the high part of the structure, and water injection in the undeveloped area and oil production in the developed area is adopted to establish the injection-production relation of one injection well to multiple production wells. In the fracture-controlled reservoirs, the mode of water injection in the secondary fault and oil production in the main fault, and water injection in the deep fracture area and shallow for oil production in the longitudinal direction is adopted to form the stereoscopic injection-production relation. In the ancient underground river reservoirs, the water injection in the main section and oil production in the branch are implemented in the main dark section, and the water injection in deep and oil production in shallow are implemented in multiple dark rivers, so as to establish the layered injection-production relation. The establishment of injection-production relation in different karst backgrounds of fractured-vuggy reservoirs lay an important foundation for maximizing water drive controlled reserves of spatial well pattern.

Key words: fracture cavity structure, injection production relationship, well pattern of spatial structure, fractured-vuggy reservoir, Tahe Oilfield

中图分类号:

TE344

李小波,刘学利,杨敏,谭涛,李青,刘洪光,张艺晓. 缝洞型油藏不同岩溶背景注采关系优化研究[J]. 油气藏评价与开发, 2020, 10(2): 37-42.

LI Xiaobo,LIU Xueli,YANG Ming,TAN Tao,LI Qing,LIU Hongguang,ZHANG Yixiao. Study on relationship optimization of injection and production in fractured-vuggy reservoirs with different karst background[J]. Reservoir Evaluation and Development, 2020, 10(2): 37-42.

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参考文献 15

[1]	鲁新便, 荣元帅, 李小波 , 等. 碳酸盐岩缝洞型油藏注采井网构建及开发意义——以塔河油田为例[J]. 石油与天然气地质, 2017,38(4):658-664 doi: 10.1177/0192623310368982 pmid: 20448086
	LU X B, RONG Y S, LI X B , et al. Construction of injection-production well pattern in fractured-vuggy carbonate reservoir and its development significance:A case study from Tahe oilfield in Tarim Basin[J]. Oil & Gas Geolgy, 2017,38(4):658-664. doi: 10.1177/0192623310368982 pmid: 20448086
[2]	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.
	JIAO F Z . 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.
[3]	吴浩, 姜汉桥, 乔岩 , 等. 封闭油藏不同含水期的井网方案优化[J]. 断块油气田, 2019 , 26(3):342-345.
	WU H, JIANG H Q, QIAO Y , et al. Optimization of well pattern design at different water-cut stage of closed reservoir[J]. Fault-Block Oil & Gas Field, 2019,26(3):342-345.
[4]	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 Y . The theory and method for development of carbonate fractured-cavity reservoirs in Tahe Oilfield[J]. Acta Petrolei Sinica, 2013,34(1):115-121.
[5]	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.
	LI Y, JIN Q, ZHONG J H , et al. Karst zonings and fracture-cave structure characteristics of Ordovician reservoirs in Tahe oilfieid, Tarim Basin[J]. Acta Prtrolei Sinica, 2016,37(3):289-298
[6]	郑松青, 杨敏, 康志江 , 等. 塔河油田缝洞型碳酸盐岩油藏水驱后剩余油分布主控因素与提高采收率途径[J]. 石油勘探与开发, 2019,46(4):746-754.
	ZHENG S Q, YANG M, KANG Z J , et al. Controlling factors of remaining oil distribution after water flooding and enhanced oil recovery methods for fracture-cavity carbonate reservoirs in Tahe Oilfield[J]. Petroleum Exploration and Development, 2019,46(4):746-754.
[7]	张云峰, 谭飞, 屈海洲 , 等. 岩溶残丘精细刻画及控储特征分析——以塔里木盆地轮古地区奥陶系风化壳岩溶储集层为例[J]. 石油勘探与开发, 2017,44(5):716-726.
	ZHANG Y F, TAN F, QU H Z , et al. Karst monadnock fine characterization and reservoir control analysis: A case from Ordovician weathering paleokarst reservoirs in Lungu area, Tarim Basin, NW China[J]. Petroleum Exploration and Development, 2017,44(5):716-726.
[8]	鲁新便, 何成江, 邓光校 , 等. 塔河油田奥陶系油藏喀斯特古河道发育特征描述[J]. 石油实验地质, 2014,36(3):268-274. doi: 10.11781/sysydz201403268
	LU X B, HE C J, DENG G X , et al. Development features of karst ancient river system in Ordovician reservoirs, Tahe Oil Field[J]. Petroleum Geology & Experiment, 2014,36(3):268-274. doi: 10.11781/sysydz201403268
[9]	韩长城, 林承焰, 鲁新便 , 等. 塔河油田奥陶系碳酸盐岩岩溶斜坡断控岩溶储层特征及形成机制[J]. 石油与天然气地质, 2016,37(5):644-652. doi: 10.11743/ogg20160504
	HAN C C, LIN C Y, LU X B , et al. Characterization and genesis of fault-controlled karst reservoirs in Ordovician carbonate karst slope of Tahe oilfield, Tarim Basin[J]. Oil & Gas Geology, 2016,37(5):644-652. doi: 10.11743/ogg20160504
[10]	鲁新便, 胡文革, 汪彦 , 等. 塔河地区碳酸盐岩断控岩溶特征与开发实践[J]. 石油与天然气地质, 2015,36(3):347-355.
	LU X B, HU W G, WANG Y , et al. Characteristics and development practice of fault-karst carbonate reservoirs in Tahe area, Tarim Basin[J]. Oil & Gas Geology, 2015,36(3):347-355.
[11]	刘洪光 . 缝洞型碳酸盐岩油藏注水开发水平分级标准初探[J]. 新疆石油天然气, 2019,15(2):44-48.
	LIU H G . Preliminary study on classification standard of water flooding development level for paleo-cave carbonate reservoir[J]. Xinjiang Oil & Gas, 2019,15(2):44-48.
[12]	宋兆杰, 杨柳, 侯吉瑞 , 等. 缝洞型油藏裂缝内油水两相流动特征研究[J]. 西安石油大学学报(自然科学版), 2018,33(4):49-54.
	SONG Z J, YANG L, HOU J R , et al. Characteristics of oil-water two-phase flow in the crack of fractured-vuggy reservoir[J]. Journal of Xi’an Shiyou University(Natural Science), 2018,33(4):49-54.
[13]	程亮 . 基于管窜影响的碳酸盐岩油藏产水特征图版——以伊拉克Ahdeb油田Rumaila复杂多层碳酸盐岩油藏为例[J]. 油气藏评价与开发, 2018,8(5):29-36.
	CHENG L . Water control diagnostic plots of carbonate reservoir based on the influence of casing channeling: A case of Rumaila complex multilayered carbonate reservoir of Ahdeb oilfield in Iraq[J]. Reservoir Evaluation and Development, 2018,8(5):29-36.
[14]	赵艳艳, 崔书岳, 张允 . 基于流线数值模拟精细历史拟合的缝洞型油藏剩余油潜力评价[J]. 西安石油大学学报(自然科学版), 2019,34(5):45-51.
	ZHAO Y Y, CUI S Y, ZHANG Y . Potential evaluation of residual oil in fractured-vuggy reservoir based on fine history fitting of streamline numerical simulation[J]. Journal of Xi’an Shiyou University(Natural Science), 2019,34(5):45-51.
[15]	耿宇迪, 周林波, 王洋 , 等. 超深碳酸盐岩复合高导流酸压技术[J]. 油气藏评价与开发, 2019,9(6):56-60.
	GENG Y D, ZHOU L B, WANG Y , et al. High conductivity acid fracturing technology in ultra-deep carbonate reservoir[J]. Reservoir Evaluation and Development, 2019,9(6):56-60.

岩溶背景	注采关系	井组数/ 对	有效率/ %	平均井组增油/10⁴ t
风化壳岩溶	低部位注高部位采	34	80	2.8
	高部位注低部位采	12	65	1.2
	裂缝注水溶洞采油	37	85	3.2
	溶洞注水裂缝采油	9	60	0.8
古暗河岩溶	主干注水分支采油	16	68	1.8
	分支注水主干采油	8	54	1.4
	笼统注水	18	60	1.1
	分层注水	6	72	2.2
断控岩溶	次级断裂注水、主干断裂采油	36	85	1.7
	主干断裂注水、次级断裂采油	25	63	1.2
	深部注水、浅层采油	26	85	1.8
	浅层注水、深部采油	12	53	0.5
	浅注注水、浅层采油	23	46	0.7