渤海BZ34低渗断块油田调整实践及其效果分析

Practice and effect analysis of development adjustment for low-permeability fault-block reservoir in BZ34 Oilfield,Bohai Bay

渤海BZ34油田具有断层发育、渗透率低、含油层段多、埋藏深、完井工艺复杂等特征,油田投产多年来逐渐暴露出诸多问题,严重影响了油田的开发水平和效果。通过对全区统层和储层精细对比研究,以及对油田构造和储层深入研究,落实了油田的石油地质储量。在精细地质研究的基础上,对油田剩余油分布情况进行研究,找出了剩余油分布规律,明确了油田综合调整的方向,并提出多项调整策略。通过近几年的综合调整,油田开发效果明显改善,实现了原油产量连续3 a负递减。该油田的综合调整实践思路与方法,可为类似低渗复杂断块油田开发中后期的高产稳产提供参考。

BZ34 Oilfield is characterized by fault development, low permeability, multiple oil-bearing horizons, deep burial and complex well completion technology. Many problems are showed after the oil production over ）,ears and these problems seriously affect the development effectiveness of the oilfield. Thus, initial oil in place of the oilfield is identified through the analysis of fine reservoir correlation and the structure and reservoir of the oilfield. Based on the detailed geological study above, residual oil distribution is studied and the distribution rule of residual oil is found out. The integrated adjustment direction is made sm＇e and multiple adjustment measures are put forward in this paper. The development eft〉ct is obviously mended and the negative production deeline is realized for continuous three years by the integrated adjustment and practice in recent years. And the idea and way of integrated adjustment of the oilfield can provide a reference fur the high yield and stable yield of the similar oilfields with low permeability and complex fauh-block at late development stage.