Petrel软件在八区下乌尔禾组256井断裂上盘精细地质与开发特征研究中的应用
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摘要
克拉玛依油田八区下乌尔禾组为特低渗透、低孔隙度、微裂缝发育的巨厚砾岩油藏。256井断裂上盘油藏开发过程中暴露出:裂缝水窜与油井低压、低能同时存在,油井见效率低,采油速度低,开发效果平面差异大等问题。以Petrel软件为工具,利用地质统计学方法,综合岩心、地震、测井、钻井及生产动态等资料,相互约束建立256井断裂上盘三维有效厚度、256井断裂体系、孔隙度、渗透率、裂缝分布模型。结合注水开发生产实际,分析相变及储层砂体的连通性是影响注水效果最重要的地质因素。对注采不对应P2w32、P2w33小层对应补孔,以提高小层对应程度,进而提高油井见效程度。补孔4口油井平均井增产油量1409t。
The P2w reservoir of the No.8 block of Karamay oilfield is a thick conglomerate reservoir of ultra-low permeability,low porosity,micro-fracture.In the oil field development of upper plate of 256 well fracture,some problems came out,which included: existing fracture channeling and low-pressure,low-energy at the same time;low ratio of response producers;low oil production rate;development effect on the large difference in plane.We used Petrel software and geostatistics,integrated core,seismic,logging,drilling and production performance,etc.to establish three-dimensional effective thickness,256 wells fault system,porosity,permeability,fracture distribution model of the upper plate of 256 well fracture.Combining it with the actual development and production of injection,we analyzed that phase change and the connectivity of the reservoir sand bodies were the most important geological factors affecting water injection.Reperforating uncorresponding injection/production layers as P2w32、P2w33,are those which can increase layers corresponding and response producer.Average incremental oil of 4 reperforating oil wells was 1409 t.
The P2w reservoir of the No.8 block of Karamay oilfield is a thick conglomerate reservoir of ultra-low permeability,low porosity,micro-fracture.In the oil field development of upper plate of 256 well fracture,some problems came out,which included: existing fracture channeling and low-pressure,low-energy at the same time;low ratio of response producers;low oil production rate;development effect on the large difference in plane.We used Petrel software and geostatistics,integrated core,seismic,logging,drilling and production performance,etc.to establish three-dimensional effective thickness,256 wells fault system,porosity,permeability,fracture distribution model of the upper plate of 256 well fracture.Combining it with the actual development and production of injection,we analyzed that phase change and the connectivity of the reservoir sand bodies were the most important geological factors affecting water injection.Reperforating uncorresponding injection/production layers as P2w32、P2w33,are those which can increase layers corresponding and response producer.Average incremental oil of 4 reperforating oil wells was 1409 t.
引文
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[2]宋海渤,黄旭日等.油气储层建模方法综述[J].天然气勘探与开发,2008,31(3):53-58.
[3]吴胜和.提高储层随机建模精度的地质约束原则[J].石油大学学报,2001,25(1):55-59.
[4]胡先莉,等.序贯模拟方法在储层建模中的应用研究[J].成都理工大学学报(自然科学版),2007,34(6):609-613.
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