临南洼陷岩性油气藏油气充满度主控因素及其模糊综合评价

Main factors controlling filling degree of lithologic reservoirs and its fuzzy comprehensive evaluation,Linnan Sag

岩性油气藏是目前临南洼陷的重要勘探领域,通过对已钻探岩性油气藏油气充满度的计算及统计分析可知,该区岩性油气藏油气充满度的主控因素包括砂体发育的构造部位和沉积体系,砂体所在的层位、油气藏类型、砂体物性、埋藏深度以及地层温度和压力也对其起到一定的控制作用。在此基础上,利用模糊数学综合评价方法,确定了该区岩性油气藏油气充满度综合评判标准并建立了模糊综合评价方程,对多个砂体进行了综合评判。

Lithologic hydrocarbon reservoirs in Linnan Sag are the most im-portant exploration targets. Based on the statistical analysis in thesag,the main factors,which controlling the filling degree of li-thologic reservoirs,have been recognized to be tectonic position of sandbodies and sedimentary systems. The filling degree of the sandbodies is the result of the coordination of many geological factors such as horizon,reservoir types,physical properties of sandbodies,buried depth,formation temperature and pressure. Fuzzy comprehensive evaluation equation and standards on the filling degree were developed,and several sandbodies were eval-uated to provide new thought for the quantitative estimation of li-thologic reservoirs in Linnan Sag.