辽河油田黄于热地区火山岩储层物性评价

通过火山岩的常规物性分析、压汞分析和裂缝密度分析,结合铸体薄片和扫描电镜,研究了辽河油田黄于热地区的火山岩储层物性特征,认为该区火山岩储层岩石类型主要有玄武岩、辉绿岩、凝灰岩和粗面岩,主要储集空间类型为次生的构造裂缝和溶蚀孔缝.实际试油结果表明裂缝密度、孔隙度、渗透率3个参数结合能够较好地反映该区储层的好坏,其中裂缝密度是评价储层质量的主要依据.裂缝改善了火山岩的储集性能,断裂活动控制着储层中裂缝的发育.最后提出了对辽河油田东部坳陷常规物性较差的储层评价分类的参考方案.

An Assessment on Reservoir Quality of Volcanic Rocks in Huang-Yu-Re Area, Liaohe Basin

Several analysis methods such as casting slice, scanning electron microscope, porosity and permeability data, mercury injection data and density of fissures are used to study the reservoir properties of volcanic rocks in Huang-Yu-Re area, the east sag of Liaohe basin. Volcanic rocks in this area are mainly composed of basalt, diabase, tuff and trachyte. The dominating type of volcanic reservoir space includes secondary solution pores and structural fissures. It is proved by the result of oil test that the combination of such three parameters as the density of fissures, porosity data and permeability data can be used to evaluate the quality of reservoirs in Huang-Yu-Re area more exactly, among which the density of fissures is the leading reference for the evaluation. The capability of the reservoir in Huang-Yu-Re area is highly improved by fissures which are mainly caused by the action of the fault. The definition of special type of reservoir, whose general property is not very good but the density of fissures is very high, is significant to the evaluation of reservoir of the whole area.