羊三木油田馆一油组油层出砂影响因素探讨

羊三木油田三断块馆陶组一段油层组为胶结疏松的高渗透砂岩稠油底水油藏,大部分采油井出砂严重,影响正常生产,研究其出砂原因及其规律对提高油田开发水平至关重要。统计分析现场资料,研究吨油出砂量与原油性质、射孔程度、生产压差和储集层性质的相关关系,确定油层控制出砂的参数有利值为:原油密度小于0.96g/cm3,射孔程度小于40%,生产压差小于4MPa,泥质含量为10.5%～16%,孔隙度小于30%。以此为依据优化11口油井生产制度,控制出砂排液生产,见到良好效果。高渗透砂岩稠油底水油藏出砂主要与储集层物性参数及生产压差有关,原油性质及射孔程度的差异也是油藏出砂的影响因素之一。图3参6

Influencing factors of reservoir sand flow in the Guan No.1 oil group, Yangsanmu Oilfield

Guan No.1 oil group of the third block, Yangsanmu Oilfield, is an unconsolidated bottom water sandstone reservoir with high permeability and viscosity. The production of most wells is affected by severe sand flow. According to onsite data and the correlation of sand production rate to oil properties, perforation extent, producing pressure drop and reservoir properties, the favorable values of the parameters controlling sand flow are derived, that is, oil density lower than 0.96g/cm~(3), perforation extent lower than 40%, producing pressure drop lower than 4MPa, shale content 10.5%-16% and porosity lower than 30%. Based on the above results, the production systems of 11 wells are optimized, sand flow is in control and better production performances are obtained. The sand flow of bottom water reservoir with high permeability and viscosity is mainly related to reservoir physical properties and producing pressure drop.And oil properties and perforation extent are also influencing factors.