利用油藏工程综合分析方法研究永宁双河东区剩余油分布规律

Using Comprehensive Analysis Method of Reservoir Engineering Studies Remaining Oil Distribution Regular A Case from Yongning Shuanghedongqu Oilfield

永宁双河油田是一个特低渗的岩性油藏,自1999年全面投入注水开发至今已进入中含水期开发阶段,随着开采程度的不断加深,地下油水关系日趋复杂,给油田稳产和挖潜带来的难度越来越大。因为区内延长组油藏储量动用程度不均均,井距不均匀,注采井网不完善,注采不易调控,造成可采储量损失大,加之采用混注,较少分注,纵向上各层吸水不均,油井措施效果变差,水淹关井井数增多,油田开效果相对变差,区内仍存在部分剩余油未被开采,为了提高采收率,对剩余油分布规律开展研究是重要的手段。文章对永宁双河油田东区剩余油分布进行了研究,以油水分布图的形式展示出剩余油在平面上地下油水运动结果及的分布范围,为油田调整挖潜提供了理论依据。

Yongning Shuanghe oilfield is a low permeability lithologic reservoirs, since 1999 is put into development by water flooding has entered the water content in the stage of development, along with the deepening of exploitation degree, the underground oil and water relationship is becoming more and more complicated, oil production and tapping the potential to bring the difficulty of getting bigger. Because the area extend Group reserves producing degree of uniform, well spacing is not uniform, injection and production well net is not perfect injection and production is not easy to control, causing a loss of reserves of large mining, combined with the use of mixed injection, fewer points note, vertical layers of absorbent, oil well measures effect variation and flooding shut in wells with the increase of the number of, oil effect is relatively worse, district still exist residual oil not mined, in order to improve the recovery rate, on the remaining oil distribution research is an important means. The Yongning Shuanghe oil field east of remaining oil distribution are studied, taking oil-water distribution charts show the remaining oil in the plane on underground water movement and the distribution range, for oilfield provides theoretical basis.