稠油吞吐开发后期改善开发效果研究

摘要：薄互层稠油油藏因其层间物性差异较大，吞吐开发后期平面及纵向动用不均的矛盾尤为突出，传统的选、配注及补充地层能量的方法已无法有效的改善吞吐效果。本文根据曙光油田杜66杜家台油藏热采开发特点，在精细储层动用程度、动用界限研究的基础上，通过优选注汽层位，调整吸汽剖面，合理配套各类措施，有效提高纵向动用程度；通过优选轮注井，在低压区域恢复地层压力，有效提高油汽比。探寻出一套适合同类型区块吞吐开发后期的动态调控对策与方法。

关键词：薄互层稠油油藏；油藏基础研究；储层动用；轮注；助排类措施；注汽管理

Abstract: the thin interbed of heavy oil reservoir physical property because of the differences between layers, stimulation and longitudinal plane development later use uneven contradiction is particularly outstanding, and traditional choose, injection allocation and the supplement of the formation energy methods can not improve stimulation effect. In this paper, according to the 66 DuGuTai du shuguang oilfield in hot oil reservoir development characteristics, in fine reservoir producing extent, use limits on the basis of study, through the optimization of a steam injection, adjust the suction steam profile, and reasonable matching all kinds of measures to effectively improve the longitudinal producing extent; Through optimizing wheel note well, and in the low pressure area is restore formation pressure, effectively improve oil than steam. Search out a suitable for the same type of late development block stimulation dynamic control countermeasures and methods.

Keywords: thin interbed of heavy oil reservoirs; Reservoir basic research; Reservoir use; Wheel note; Help row kind of measure; Steam injection management

引言

曙光油田以稠油开发为主，其中薄互层稠油油藏储量占68.4%,其主力油层可采储量采出程度已达85%以上。因其层间物性差异大，且平面上动用程度不均，随着油藏开发时间延长、吞吐周期增加及采出程度提高，油汽比逐步降低，吞吐效果逐年变差，区块产量下降，开发效果越来越差。因此优化注汽方式，改善平面、纵向动用程度已成为保证油田经济高效开发的主要手段之一。[1]

1、油藏概况

曙光油田杜66块位于曙光油田西南部。构造上位于辽河断陷西部凹陷西