薄差储层有效动用井距和合理井排距比研究——以大庆油区杏六东块为例  

Study on effective well distance and well array for thin and low productive reservoir-a case study of east part of Xing6 area, Daqing oilfield

作　　者：梁爽[1] 刘义坤[1] 于倩男[1] 陈实 张宁 

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]中国石油吉林油田分公司采油工艺研究院,吉林松原138001 [3]中海油能源发展有限公司钻采工程研究院,天津300452

出　　处：《油气地质与采收率》2014年第1期78-80,116,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"薄差油层动用条件及层系井网优化研究"(2011ZX05010-002-05);"大型油气田及煤层气开发"(2011ZX05052);研究生创新基金"大庆长垣特高含水油田措施优化方法研究"(YJSCX2012-050HLJ)

摘　　要：随着油气田开发的深入,水驱开发的主要对象已由中高渗透层转变为薄差储层,薄差储层开发井网部署存在注采关系不完善、地层压力水平低、动用程度低等问题。以大庆油区杏六东块为例,通过油藏工程方法计算出不同渗透率条件下的有效动用井距,以流管模型为基础,求解菱形五点法井网不同井排距比的有效动用系数。结果表明,薄差储层的平均渗透率为12×10-3μm2,对应的有效动用井距为180 m,合理井排距比为1.8。数值模拟法验证结果表明,井排距比为1.8时,薄差储层的波及范围最大,见水最早,采出程度最高,与理论计算结果相符。Along with the development of oil and gas field, most blocks enter into the high water cut stage, and even very high water cutstage. Thin and low productive reservoirs are the potential reservoir by means of water flooding instead of the middle and high perme-able reservoirs in low and medium water cut stage. With the imperfect injection-production relationship, low formation pressure, andlow degree of producing reserves on thin and poor reservoirs. Taking the Xing6 east block of Daqing oilfield for example, the effectiveinjection-production well spacing with different permeability is calculated by reservoir engineering methods, based on the flow tubemodel, the effective producing coefficient of different ratio of space between wells and rows for rhombus five-spot well pattern issolved. The results show that, the permeability of thin and poor reservoir is 12×10-3μm2, and the corresponding effective injection-pro-duction well spacing is 180m, and the reasonable ratio of space between wells and rows is 1.8. The numerical models test and verify theresults of theoretical methods, that is, the ratio is 1.8, the recovery factor is highest, the sweeping scope is large, and the water break-through time is earliest.

关 键 词：薄差储层 渗透率 有效动用 井距 井排距比 

分 类 号：TE319[石油与天然气工程—油气田开发工程]