北一二排西层系井网调整与效果分析
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摘要
针对北一、二排西开发中出现的水驱产量下降幅度较大、油层动用状况较差、地层压力较低等问题,对该区块层系井网调整潜力进行了研究。结合影响区块开发效果的几点原因,分析认为仅依靠常规的动态调整措施难以有效地改善区块整体开发状况,通过层系井网调整的实施,全区日产液增加5 640 t,日产油增加197 t,含水率基本稳定,采油速度上升至0.60%,流压沉没度得到恢复,区块整体开发状况得到有效改善。截止2017年8月已累计增油20.5×104t,提高采收率2.0%以上,井网加密、细分层系调整效果显著,解决了油层动用程度差的问题,提高了最终采收率。
Aiming at the problems such as the large decline in water flooding production, the poor utilization of reservoirs, and the low formation pressure in the development of North First and Second Section West, the potential of well pattern adjustment in this area was studied. Combined with several reasons that affect the development effect of the block, it is analyzed that it is difficult to effectively improve the overall development status of the block by relying only on regular dynamic adjustment measures. Through the implementation of layered well pattern adjustment, the daily production volume of the entire area is increased by 5 640 t and the daily oil production is increased by 197 t. The water content was basically stable, the oil production rate rose to 0.60%, the flow pressure subsidence was restored, and the overall development of the block was effectively improved. As of August 2017, it has accumulatively increased oil by 20.5 × 104 t, and it is expected to increase oil recovery by more than 2.0 percentage points.Well network encryption and subdivision layer system adjustments have achieved significant effects, which solved the problem of poor level of use and improved the ultimate recovery rate.
Aiming at the problems such as the large decline in water flooding production, the poor utilization of reservoirs, and the low formation pressure in the development of North First and Second Section West, the potential of well pattern adjustment in this area was studied. Combined with several reasons that affect the development effect of the block, it is analyzed that it is difficult to effectively improve the overall development status of the block by relying only on regular dynamic adjustment measures. Through the implementation of layered well pattern adjustment, the daily production volume of the entire area is increased by 5 640 t and the daily oil production is increased by 197 t. The water content was basically stable, the oil production rate rose to 0.60%, the flow pressure subsidence was restored, and the overall development of the block was effectively improved. As of August 2017, it has accumulatively increased oil by 20.5 × 104 t, and it is expected to increase oil recovery by more than 2.0 percentage points.Well network encryption and subdivision layer system adjustments have achieved significant effects, which solved the problem of poor level of use and improved the ultimate recovery rate.
引文
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[3]段强国.SN开发区特高含水期层系井网调整技术界限研究[D].大庆:东北石油大学,2013.
[4]兰丽凤.特高含水油田层系井网调整潜力及调整模式研究[D].北京:中国地质大学(北京),2011.
[5]季迎春.特低渗透油田经济开发差异化井网调整方法[J].科学技术与工程,2014,14(13):176179.Ji Y C. Different area with different well spacing adjustment method for an extralow permeability oilfield[J]. Science Technology and Engineering,2014,14(13):176179.
[6]张野.Ta2井不同阶段注聚参数优选及井网优化研究[D].大庆:东北石油大学,2013.
[7]樊兆琪,程林松,耿昌浩,等.低渗透油藏储层非均质性评价与井网调整新方法[J].石油钻探技术,2013,41(2):9398.Fan Z Q,Cheng L S,Geng C H,et al. A new approach for heterogeneity evaluation and well pattern adjustment in low permeability reservoirs[J].Petroleum Drilling Techniques,2013,41(2):9398.
[8]曲瑛新.低渗透砂岩油藏注采井网调整对策研究[J].石油钻探技术,2012,40(6):8489.Qu Y X. Research on adjustment measures of injectionproduction patterns for low permeability sandstone reservoirs[J].Petroleum Drilling Techniques,2012,40(6):8489.
[9]王春雨.肇212地区井网优化调整方法研究[D].大庆:东北石油大学,2011.
[10]邱长波.二类油层注聚区水驱井网调整方法研究[D].大庆:东北石油大学,2010.
[11]贾宝龙.台肇地区井网调整方法研究及综合治理研究[D].大庆:大庆石油学院,2009.
[12]王瑶.萨中开发区高台子油层层系井网优化调整方法研究[D].大庆:东北石油大学,2016.
[13]王东琪.杏北纯油区典型区块水驱层系井网优化调整开发效果研究[D].大庆:东北石油大学,2016.
[14]徐魁生.杏南试验区层系井网调整方案研究[D].大庆:东北石油大学,2013.
[15]伍险峰.复杂断块层系细分及井网完善总体调整研究[J].内蒙古石油化工,2008,34(21):131133.Wu X F.Research on the overall adjustment of complicated fault block layer subdivision and well pattern improvement[J].Inner Mongolia Petrochemical Industry,2008,34(21):131133.
[16]朱博敏.萨中开发区高台子油层井网井距优化[J].辽宁石油化工大学学报,2017,37(5):3843.Zhu B M. Optimization of well spacing in Gaotaizi reservoir of sazhong development zone[J]. Journal of Liaoning Shihua University,2017,37(5):3843.