低渗透各向异性地层合理井排距比研究

以长庆油田某区块为例,从低渗透油藏流体地下渗流机理出发,根据低渗透油田开发地质特征,建立了102个不同的地质模型。通过102种方案的设计,在相应的地质模型基础上,运用数值模拟方法,对合理井排距比进行了研究,得到确定低渗透油藏合理井排距比理论图版,利用图版可以确定对低渗透油田不同各向异性程度下合理井排距比,低渗透油藏的经济有效地开发具有重要的理论意义和实用价值。

STUDY OF THE REASONABLE RATIO OF SPACE BE-TWEEN WELLS AND ROWS IN LOW PERMEABILITY RESERVOIRS

Based on fluid flowing through porous media mechanisms and the geologic characteristic of exploitation, 102 geologic models were established in low permeability reservoir of Changqing oil field in this paper. Using numerical simulation,102 schemes were designed and calculated in rhomboidal andrectangular well patterns. A theoretical plate of reasonable ratio of space between wells and rows in different well patterns were studied, and different anisotropy degree formations of low per-meability reservoirs were determined. Through the theoretical plate, the reasonable ratio of space between wells and rows was easily acquired. All these things will provide theoretical supportsfor designing the exploitation schemes.