柴达木盆地英西地区缝洞型碳酸盐储层碳酸盐岩含量为40%~50%、埋深在3 600~4 700m之间、地应力梯度为0.020MPa/m，裂缝发育密度为2~8条/m、基质渗透率为(0.01~0.9)×10-3um2，以往酸化及酸压后单井产量低、递减快、有效期短、累计产量小。借鉴体积改造理念，通过增大改造规模增加水力裂缝长度沟通油气富集区，采用大排量、高比例滑溜水、复合粒径支撑剂施工提高裂缝复杂程度，保证压后效果。2017年在英西碳酸盐储层进行体积压裂改造4口井(水平井1口)，压后效果显著:直井压后初产是2016年施工井的1.8倍，水平压后初产是直井的21倍，其中SH1井压后日产油为395m3、天然气为5 796m3。研究成果为其他裂缝型碳酸盐岩致密储层改造提供了经验。
The fractured carbonate reservoirs in the Yingxi area of Qaidam Basin have characteristic of carbonate content of 40%-50%，burial depth of 3 600-4 700m，stress gradient of 0.020MPa/m，natural fracture density of 2-8/m and matrix permeability of (0.01-0.9)×10-3μm2.After the traditional acidizing and acid-fracturing method，we are still facing problems such as low oil recovery，fast decrease，short production period and low cumulative output.Drawing on the concept of volume fracturing，fractures length and connected oil-gas enrichment area increased by the increase of fracturing scale.What’s more，large scale pump，highslick water proportion and combined proppant methods were used to increase the fracture complexity and the output effect.In 2017，4 wells (including a horizontal well) were constructed in this area and the results showed that the primary production of vertical wells increased 1.8 times and the output of the horizontal well was 21 times than vertical wells，e.g.，oil and gas rate of Well SH1 is 395m3/dand 5 796m3/dafter volume fracturing.Study of this paper can provide experience for other fractured carbonate tight reservoirs.
［1］Roberts L D.The effect of surface kinetics in fracture acidizing[J].SPE Journal，1974，14(4):385-395.
[2]Roberts L D，Guin J A.A new method for predicting acid penetration distance[J].SPE Journal，1975，15(4):277-286.
[3]Xu Yun.A review on carbon dioxide corrosion of steel in aqueous media for oilfield chemical engineers[J].Oilfield Chemistry，1997，14(2):175-179.
胥云.碳酸盐岩储层酸压工艺技术综述[J].油田化学，1997，14(2):175-179.
[4]Xu Yun，Lou Xiang.Theory research and development of in-depth acid fracturing of carbonate reservoir[J].Well Testing，2002，11(1):4-7.
胥云，楼湘.碳酸盐岩储层深度酸压理论研究现状与发展[J].油气井测试2002，11(1):4-7.
[5]Xu Yun，Sun Lingyun，Ma Baining.Experimental research of depth acid fracturing technology in Gasi E23 complex lithology reservoir of Qinghai[J].Drilling & Production Technology，2002，25(4):31-34.
胥云，孙凌云，马白宁.青海尕斯 E23复杂岩性油藏深度酸压技术先导性试验研究[J].钻采工艺，2002，25(4):31-34.
[6]Gou Bo，Guo Jianchun，He Chunming，et al.Feasibility of network acidification in the naturally fractured gas reservoir[J].Natural Gas Geoscience，2014，25(7):1090-1096.
苟波，郭建春，何春明，等.裂缝性气藏网络酸化可行性[J]．天然气地球科学，2014，25(7):1090-1096.
[7]He Chunming，Chen Hongjun，Wang Wenyao.Diversion acidizing used for carbonate reservoir:Sate-of-the-art and development[J].Petroleum Drilling Techniques，2009，37(5):121-126.
何春明，陈红军，王文耀.碳酸盐岩储层转向酸化技术现状与最新进展[J].石油钻探技术，2009，37(5):121-126.
[8]Wu Qi，Xu Yun，Wang Tengfei，et al.The revolution of reservoir stimulation:An introduction of volume fracturing[J].Natural Gas Industry，2011，31(4):7-11.
吴奇，胥云，王腾飞，等.增产改造理念的重大变革——体积改造技术概论[J].天然气工业，2011，31(4):7-11.
[9]Wu Qi，Xu Yun，Wang Xiaoquan，et al.Volume fracturing technology of unconventional reservoirs:Connotation，optimization design and implementation[J].Petroleum Exploration and Development，2012，39(3):352-358.
吴奇，胥云，王晓泉，等.非常规油气藏体积改造技术——内涵、优化设计与实现[J].石油勘探与开发，2012，39(3):352-358.
[10]Wu Qi，Xu Yun，Zhang Shouliang，et al.The core theories and key optimization designs of volume stimulation technology for unconventional reservoirs[J].Acta Petrolei Sinica，2014，35(4):706-713.
吴奇，胥云，张守良，等.非常规油气藏体积改造技术核心理论与优化设计关键[J].石油学报，2014，35(4):706-713.
[11]Rickman R，Mullen M J，Petre J E，et al.A Practical Use of Shale Petrophysics for Stimulation Design Optimization:All Shale Plays are Not Clones of the Barnett Shale[C].SPE Annual Technical Conference and Exhibition，Denver，Colorado:USA，2008.
甘公网安备 62010202000678号