摘要
"认识剩余油,挖掘剩余油"己成为高含水期老油田开发、调整、提高采收率的核心内容[2]。油田开发实践表明,高含水期剩余油分布特征是总体分散、局部集中,地下储集层中还存在较多剩余油富集区,提高采收率的潜力仍然较大。影响剩余油分布的因素通常划分为两类:地质因素和开发因素。地质因素主要包括:油藏非均质性、构造、断层等。开发因素主要包括:注采系统的完善程度、注采关系、生产动态等等。地质因素属于内因,开发因素属于外因[6-7]。它们的综合作用就导致了目前剩余油分布的多样化、复杂化。本文针对文明寨油田构造极复杂、非均质严重的油藏特征,深入研究剩余油富集区形成机理和分布规律,形成剩余油富集区描述与预测技术,从而形成了高含水期极复杂断块非均质油藏剩余油富集区研究的理论体系与配套挖潜技术。其做法对同类油田具有借鉴意义。
The study of remained oil distribution is very important in complicated faulted-block reservoir in high water-cut stage. According to the facts of the complicated structure in the areas, different characters in inter formation, difficulty in porential exploitation measures, the study has been finished, which included fine formation contrast, fault and fault block structure, fault proof, remained oil distribution and fine structure in big fault blocks, adaptablity of well net, low resistant formation, etc. On the basis of study above, four kinds of potential areas and eleven remaining oil zones are put forward. Taking single sand bodies as the potential-finding and adjusting targets, the new and renewal wells are drilled in potential areas, and layer series and well pattern are regrouped. After the accessory potential exploitation measures put into practice in highly complicated block reservoir of Wenmingzhai, both the development benefits and levels of high water cut stage are improved,and so eight series technologies have been set up, all of which will be a reference in the same kind of oil field.
出处
《新疆石油天然气》
CAS
2008年第4期69-72,共4页
Xinjiang Oil & Gas
关键词
东濮凹陷
剩余油
非均质
高含水期
Dongpu basin
remaining oil
complicated faulted-block
high water-cut stage
expand exploration
