萨中开发区东部二类油层聚合物驱注入标准研究
发布时间：2018-08-18 10:34
【摘要】：萨中开发区自1999年以来,通过现场试验、对象优化、井距优化、注剂优化及注入参数优化,二类油层三次采油技术已经逐步成熟。至2013年9月已有七个区块开展了二类油层聚合物驱,开采层位萨Ⅱ10~萨Ⅲ10,注采井距由175m缩小到150m、125m,年产油量占聚合物驱总产量的40%左右。以及油田公司技术座谈会形成的同期分质、交替注入不同分子量、不同浓度聚合物是实现最大幅度提高采收率、最佳经济效益的有效手段共识,在参数设计中以聚合物驱油室内研究成果、矿场实践经验以及数值模拟结果为依据,借鉴矿场交替注入试验区的经验,并结合中区东部二类油层层内、层间、井间、站间差异,对单井分子量实施个性化交替注入设计。中区东部萨Ⅱ10~萨Ⅲ10二类油层聚合物驱驱油方案,依据室内实验和已开展的二类油层聚合物驱矿场经验,采取聚合物分子量整体优化设计、注入参数井组个性化设计、按井组不同类型设计交替注入段塞及优化段塞组合的驱油方式。中区东部葡一组主力油层聚合物驱结束后,根据油田公司“十二五”期间二类油层三次采油全部实施聚合物驱的要求,于2011年5月编制完成中区东部二类油层三次采油油藏工程方案,按照油藏工程方案设计中区东部层段组合分三段开发,首次开采层段为萨Ⅱ10~萨Ⅲ10。区块含油面积7.28km2,油水井422口,206注216采,注采井距125×133m。射开砂岩厚度18.0m,有效厚度10.3m,平均有效渗透率0.572μm2。按照规划安排区块于2011年11月钻井、基建,2012年6月新井投产进入空白水驱,预计2013年10月实施二类油层聚合物驱。
[Abstract]:Since 1999, through field test, object optimization, well spacing optimization, injection agent optimization and injection parameter optimization, the tertiary oil recovery technology of the second class reservoir has been gradually matured. By September 2013, seven blocks had developed the second class polymer flooding, and the interval between injection and production was reduced from 175m to 150m ~ 125m, and the annual oil production was about 40% of the total production of polymer flooding. As well as the consensus that the simultaneous separation of quality, alternating injection of different molecular weight and different concentrations of polymers formed at the technical forum of oil field companies is an effective means to maximize oil recovery and achieve the best economic benefits. Based on the laboratory research results of polymer flooding, field practice and numerical simulation results, the paper draws lessons from the experience of the field alternating injection test area, and combines the differences among the second class oil layers, wells and stations in the eastern part of the central area. Individualized alternative injection design was carried out for molecular weight of single well. Based on laboratory experiments and the field experience of polymer flooding in the second class reservoir, the polymer flooding scheme of the second class oil reservoir from sa 鈪，
本文编号：2189199
[Abstract]:Since 1999, through field test, object optimization, well spacing optimization, injection agent optimization and injection parameter optimization, the tertiary oil recovery technology of the second class reservoir has been gradually matured. By September 2013, seven blocks had developed the second class polymer flooding, and the interval between injection and production was reduced from 175m to 150m ~ 125m, and the annual oil production was about 40% of the total production of polymer flooding. As well as the consensus that the simultaneous separation of quality, alternating injection of different molecular weight and different concentrations of polymers formed at the technical forum of oil field companies is an effective means to maximize oil recovery and achieve the best economic benefits. Based on the laboratory research results of polymer flooding, field practice and numerical simulation results, the paper draws lessons from the experience of the field alternating injection test area, and combines the differences among the second class oil layers, wells and stations in the eastern part of the central area. Individualized alternative injection design was carried out for molecular weight of single well. Based on laboratory experiments and the field experience of polymer flooding in the second class reservoir, the polymer flooding scheme of the second class oil reservoir from sa 鈪，
本文编号：2189199
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