西南石油大学学报（自然科学版）
西南石油大學學報（自然科學版）
서남석유대학학보（자연과학판）
JOURNAL OF SOUTHWEST PETROLEUM UNIVERSITY(SEIENCE & TECHNOLOGY EDITION)
2014年
2期
128-132
,共5页
精细挖潜%油层非均质性%驱油效率系数%动用程度%结构调整措施
精細挖潛%油層非均質性%驅油效率繫數%動用程度%結構調整措施
정세알잠%유층비균질성%구유효솔계수%동용정도%결구조정조시
fine tapping potentialities%oil layer heterogeneity%flushing efficiency coefficient%producing degree%structural regulation measure
特高含水期水驱油藏层间、井间动用程度差异大，需要通过注采系统调整与结构调整等挖潜措施提高薄差油层的动用程度。基于采收率与波及系数、驱油效率的关系式，引入了驱油效率系数这一概念，用于描述多层非均质油藏的动用状况，并建立了多层非均质油藏小层驱油效率系数与采收率的关系式，结合数值模拟结果，计算了每个小层的驱油效率系数。通过分析压裂、堵水、细分注水等结构调整措施前后的驱油效率系数累积分布曲线形态、驱油效率系数平均值与变异程度的变化，反映油层间动用程度的差异及高低。结果表明，措施后驱油效率系数累积分布曲线向右偏移、斜率变大、驱油效率系数的变异程度变小、平均值变大，说明非均质油层的动用程度和动用不均匀状况得到明显改善，实现了对油层动用程度的定量分析。为特高含水期非均质油层动用状况评价提供了一种新方法和理论依据。
特高含水期水驅油藏層間、井間動用程度差異大，需要通過註採繫統調整與結構調整等挖潛措施提高薄差油層的動用程度。基于採收率與波及繫數、驅油效率的關繫式，引入瞭驅油效率繫數這一概唸，用于描述多層非均質油藏的動用狀況，併建立瞭多層非均質油藏小層驅油效率繫數與採收率的關繫式，結閤數值模擬結果，計算瞭每箇小層的驅油效率繫數。通過分析壓裂、堵水、細分註水等結構調整措施前後的驅油效率繫數纍積分佈麯線形態、驅油效率繫數平均值與變異程度的變化，反映油層間動用程度的差異及高低。結果錶明，措施後驅油效率繫數纍積分佈麯線嚮右偏移、斜率變大、驅油效率繫數的變異程度變小、平均值變大，說明非均質油層的動用程度和動用不均勻狀況得到明顯改善，實現瞭對油層動用程度的定量分析。為特高含水期非均質油層動用狀況評價提供瞭一種新方法和理論依據。
특고함수기수구유장층간、정간동용정도차이대，수요통과주채계통조정여결구조정등알잠조시제고박차유층적동용정도。기우채수솔여파급계수、구유효솔적관계식，인입료구유효솔계수저일개념，용우묘술다층비균질유장적동용상황，병건립료다층비균질유장소층구유효솔계수여채수솔적관계식，결합수치모의결과，계산료매개소층적구유효솔계수。통과분석압렬、도수、세분주수등결구조정조시전후적구유효솔계수루적분포곡선형태、구유효솔계수평균치여변이정도적변화，반영유층간동용정도적차이급고저。결과표명，조시후구유효솔계수루적분포곡선향우편이、사솔변대、구유효솔계수적변이정도변소、평균치변대，설명비균질유층적동용정도화동용불균균상황득도명현개선，실현료대유층동용정도적정량분석。위특고함수기비균질유층동용상황평개제공료일충신방법화이론의거。
The interlayer and interwell producing degree are very different in the water drive reservoir during the stage of extra-high water cut. Based on the relational expression of the recovery,the sweep efficiency and the displacement efficiency, this paper introduces the conception of flushing efficiency coefficient to describe producing degree of multilayer heterogeneous reservoir and establishes the relational expression of recovery and flushing efficiency coefficient of the multilayer heterogeneous reservoir. With the result of the numerical simulation,we calculate the flushing efficiency coefficient of every sublayer. We also find out the difference of interlayer producing degree by analyzing the variation of cumulative distribution curve shapes,and average values and variability of flushing efficiency coefficient before and after the structural regulation of fracturing,water plugging,subdivision water injection and so on. The result illustrates that the cumulative distribution curve shifts towards right whose slope becomes bigger,the variability of flushing efficiency coefficient becomes smaller and the average values of flushing efficiency coefficient becomes bigger. Those demonstrate that the producing degree of heterogeneous oil layers and uneven producing condition has been improved,and quantitative analysis of the producing degree of the oil layers has been achieved. Therefore,this paper provides a new method and theoretical foundation for the producing degree of heterogeneous oil layers during the stage of extra-high water cut.
