渤海BZ河流相油田水平井开发模式总结与水驱效果评价
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摘要
BZ油田是渤海中型常规油河流相油田,具有单砂体形态不规则、储量规模差异较大、储层横向变化快、纵向上多期河道砂体相互交错叠置的特征,针对此特点,探索出一种适合该油田的高效开发模式和策略:即早期单砂体水平井分层系布井,开发中期通过水平井对未动用储量进行挖潜,高含水期基于储层构型认识对井网内部剩余油进行挖潜。BZ油田水平井开发模式实现了多年稳产,水驱开发指标整体保持较好。根据渤海油田水驱指标评价标准,对含水上升率和递减率两类关键水驱指标评价过程进行了优化,并将得到的结果应用于BZ油田,其评价标准均为一类水平。
BZ oilfield in the Bohai sea is a medium-sized conventional fluvial facies oilfield, which characterized by irregular shape of single sand body, big differences on reserves scale, rapid lateral change of reservoirs, and multiphase mutual superimposed characteristics of channel sand bodies in vertical direction. In view of the characteristics mentioned above, an efficient development mode and strategy suitable for the oilfield are explored. In the early stage, layered well spacing of single sand body with horizontal wells was adopted. In the middle development stage, potential tapping of untapped reserves with horizontal wells was adopted. In high water cut stage, potential tapping of residual oil inside well pattern based on reservoir configuration was adopted. The horizontal well development mode of BZ oilfield has realized stable production for many years, and the water flooding development index has kept good.According to the evaluation criteria of water flooding indexes in Bohai oilfield, the evaluation process of two key water flooding indexes, namely the rise rate and decline rate of water cut, was optimized. The obtained results were applied to BZ oilfield and the evaluation criteria are all of the same standard.
BZ oilfield in the Bohai sea is a medium-sized conventional fluvial facies oilfield, which characterized by irregular shape of single sand body, big differences on reserves scale, rapid lateral change of reservoirs, and multiphase mutual superimposed characteristics of channel sand bodies in vertical direction. In view of the characteristics mentioned above, an efficient development mode and strategy suitable for the oilfield are explored. In the early stage, layered well spacing of single sand body with horizontal wells was adopted. In the middle development stage, potential tapping of untapped reserves with horizontal wells was adopted. In high water cut stage, potential tapping of residual oil inside well pattern based on reservoir configuration was adopted. The horizontal well development mode of BZ oilfield has realized stable production for many years, and the water flooding development index has kept good.According to the evaluation criteria of water flooding indexes in Bohai oilfield, the evaluation process of two key water flooding indexes, namely the rise rate and decline rate of water cut, was optimized. The obtained results were applied to BZ oilfield and the evaluation criteria are all of the same standard.
引文
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[2]秦润森,廖新武,冯鑫,等.秦皇岛32–6油田南区明下段Ⅰ油组3小层河道砂体叠置类型及其动态响应特征[J].油气地质与采收率,2014,21(3):15–19.
[3]刘建民,徐守余.河流相储层沉积模式及对剩余油分布的控制[J].石油学报,2003,24(1):58–62.
[4]李道品.“垂向驱油”论[J].大庆石油地质与开发,2009,28(6):66–73.
[5]陈常红.储层垂向非均质性对驱油效率的影响研究[D].北京:中国地质大学北京,2016.
[6]付国民,刘云焕,宁占强.裂缝性特低渗透储层注水开发井网的优化设计[J].石油天然气学报,2006,28(2):94–96.
[7]姜瑞忠,侯玉碚,王平,等.流场重整提高采收率技术研究[J].大庆石油地质与开发,2012,31(4):74–75.
[8]姚征.油藏流场评价体系的建立及提高采收率研究[D].山东青岛:中国石油大学,2014.
[9]李才学,沈曦,贾卫平,等.高含水期油藏液流方向优化及流线模拟[J].断块油气田,2015,22(5):641–646.
[10]孙致学,黄勇,王业飞,等.基于流线模拟的水井配注量优化方法[J].断块油气田,2016,23(6):753–757.
[11]郭文卿,李志平,杨燕春,等.液流转向技术在赵凹油田Ⅳ3~1层开发中的应用[J].石油地质与工程,2016,26(6):80–82.
[12]张继风.水驱油田开发效果评价方法综述及发展趋势[J].岩性油气藏,2012,24(3):118–122.
[13]缪飞飞,张宏友,张言辉,等.一种水驱油田递减率指标开发效果评价的新方法[J].断块油气田,2015,22(3):353–355.
[14]苏彦春,王月杰,缪飞飞.水驱砂岩油藏开发指标评价新体系[J].中国海上油气,2015,27(3):60–65.
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