七里村油田一层多缝压裂工艺设计
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摘要
通过对七里村油田4口压裂井微地震检测分析,确定该油田水力压裂裂缝为水平缝,适合一层多缝压裂.通过对已压裂的一层一缝、一层两缝和一层三缝的压裂井产量统计分析,结合当前压裂施工工艺,利用以前压裂施工统计数据并配合软件模拟,对一层两缝压裂工艺的裂缝长、施工排量和加砂规模等压裂参数进行优选,最终确定七里村油田最优压裂参数为:裂缝长度35～42 m,加砂规模19.23～27.69 m3,施工排量1.8～2.2 m3/min,携砂液量64.10～92.30 m3等.通过对一层两缝试验井与一层一缝压裂以及优化前的一层两缝压裂井产量比较,结果表明参数优化后一层两缝压裂可以大幅提高油井产量和稳产产量,更适合于七里村油田.
It is determined that the hydraulic fracturing fractures of Qilicun Oilfield are in horizontal direction by the micro seismic detection analysis of four fractured wells,so the multi-fracture fracturing technology in one oil layer is suitable to Qilicun Oilfield.According to the statistical analysis of the yield of the fractured wells with one-fracture,two-fracture and three-fracture in one layer and the current fracturing construction technology,the parameters of the two-fracture fracturing technology in one layer,such as the fracture length,construction flow rate,sand amount,etc.,are optimized by means of previous fracturing operation statistical data and simulation software.The main optimal fracturing parameters of Qilicun Oilfield are determined as following: fracture length is 35～42 m,construction flow rate is 1.8～2.2 m3/min,and sand amount is 64.10～92.30 m3.The yields of the two-fracture well with optimized fracturing parameters,one-fracture well of not optimized fracturing parameters,two-fracture well of not optimized fracturing parameters are compared,and it is shown that,two-fracture well of optimized fracturing parameters has the highest yield and stable yield,which proves the multi-fracture fracturing technology in one oil layer is suitable to Qilicun Oilfield again.
It is determined that the hydraulic fracturing fractures of Qilicun Oilfield are in horizontal direction by the micro seismic detection analysis of four fractured wells,so the multi-fracture fracturing technology in one oil layer is suitable to Qilicun Oilfield.According to the statistical analysis of the yield of the fractured wells with one-fracture,two-fracture and three-fracture in one layer and the current fracturing construction technology,the parameters of the two-fracture fracturing technology in one layer,such as the fracture length,construction flow rate,sand amount,etc.,are optimized by means of previous fracturing operation statistical data and simulation software.The main optimal fracturing parameters of Qilicun Oilfield are determined as following: fracture length is 35～42 m,construction flow rate is 1.8～2.2 m3/min,and sand amount is 64.10～92.30 m3.The yields of the two-fracture well with optimized fracturing parameters,one-fracture well of not optimized fracturing parameters,two-fracture well of not optimized fracturing parameters are compared,and it is shown that,two-fracture well of optimized fracturing parameters has the highest yield and stable yield,which proves the multi-fracture fracturing technology in one oil layer is suitable to Qilicun Oilfield again.
引文
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[2]聂仁仕,贾永禄,朱水桥,等.水平井不稳定试井与产量递减分析新方法[J].石油学报,2012,33:38-42.NIE Ren-shi,JIA Yong-lu,ZHU Shui-qiao,et al.A newmethod for the transient well test of horizontal wells andthe analysis of the production decline[J].Acta PetroleiSinica,2012,33:38-42.
[3]王国顺,刘建中,柳林旺.微地震方法检测镇泾油田长8油藏压裂、注水效果分析[J].中国工程科学,2012,14(1):76-81.WANG Guo-shun,LIU Jian-zhong,LIU Lin-wang.Anal-ysis of using microseismic monitoring to verify fracturingand waterflood on reservoir Chang 8 of Zhengjing Oilfield[J].Engineering Sciences,2012,14(1):76-81.
[4]衣同春,陈喜民,王鸿勋.水平裂缝压裂工艺参数优选[J].石油钻采工艺,1989,11(3):55-64.YI Tong-chun,CHEN Xi-min,WANG Hong-xun.Opti-mization of the technological parameters of HorizontalFracturing[J].Oil Drilling Production Technology,1989,11(3):55-64.
[5]张士诚,魏明臻,李志恩.大庆油田密井网水平裂缝参数的优选[J].石油大学学报,1999,23(6):36-39.ZHANG Shi-cheng,WEI Ming-zhen,LI Zhi-en.Densewell pattern of Daqing oilfield horizontal fracture parame-ter optimization[J]Journal of the University of Petroleum,1999,23(6):36-39.
[6]韩秀玲,张士诚,马新仿,等.水平缝五点井网整体压裂参数优化[J].特种油气藏,2010,17(1):111-113.HAN Xiu-ling,ZHANG Shi-cheng,MA Xin-fang,et al.Optimization of integral fracturing parameters for five-spotpattern with horizontal fractures[J].Special Oil&GasReservoirs,2010,17(1):111-113.
[7]魏明臻,王鸿勋,张士诚.水平裂缝参数优化技术研究[J].断块油气田,1998,6(3):36-39.WEI Ming-zhen,WANG Hong-xun,ZHANG Shi-cheng.Technology researchon parameters optimization of horizon-tal fracture[J].Fault-Block Oil&Gas Field,1998,6(3):36-39.
[8]Surjaatmadja J B.Grundmann S R.Hydra Jet Fracturing,an Effective Method for Placing Many Fractures in OpenHole Horizontal Wells[C].SPE 48856,1998.
[9]迟静.特低渗油田水力压裂参数优化研究[J].西北地质,2003,36(1):70-73.CHI Jing.Hydro-fracture parameters optimized on the oil-field of extra lower permeability[J].Northwestern Geolo-gy,2003,36(1):70-73.
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