准噶尔盆地低渗透砾岩油藏未动用储量开发潜力

Development Potential of Undeveloped Reserves of Low-Permeability Conglomerate Reservoirs,Junggar Basin

综合地质、开发等基础资料,对准噶尔盆地低渗透砾岩油藏已开发区块进行开发效果评价。通过对已开发区块开发效果专家评分与基础评价参数进行分析,确定表征油藏开发效果的关键参数为储量丰度、空气渗透率、千米井段日产油量、原油黏度等,并将这些参数与开发效果专家评分进行多元线性回归,建立开发潜力综合评价模型。在此基础上,结合战略因素分析理念,建立油藏地质因素和经济环境因素评价图版,分别以内部收益率大于8%,综合评分大于72分为标准,筛选出JL-2,B-34,M-2,JW-42,W-109和531共6个区块作为中期开发目标;以内部收益率大于12%,综合评分大于78分为标准,筛选出M-18,X-54和X-50共3个区块作为近期开发目标,为开发决策提供了依据。

Combining the data of geology and exploitation, the paper systematically evaluates the development effects of low-permeabilityconglomerate reservoirs in Xinjiang oilfield. Through the analysis of the development effect scores given by experts for developed blocksand the basic evaluation parameters, the key parameters which can characterize the development effects are determined as reserves abun-dance, air permeability, daily oil production per kilometer in depth and oil viscosity. Multivariate linear regression has been performed forthese parameters and development effect scores given by experts, and a comprehensive model has been established for development poten-tial evaluation. Based on which, combining with the strategic factor analysis, the paper builds evaluation charts for reservoir geology factorsand economic environment factors. Taking the internal rate of return greater than 8% and the comprehensive score higher than 72 as crite-ria, respectively, 6 blocks including JL-2, B-34, M-2, JW-42, W-109 and 531 are selected as the mid-term development targets. Taking theinternal rate of return greater than 12% and the comprehensive score higher than 78 as criteria, respectively, 3 blocks such as M-18, X-54 and X-50 are selected as the short-term development targets, which can provide basis for development decision making.