昆北油田调剖工艺研究与现场应用

发布时间：2018-12-29 19:36

【摘要】：昆北油田属于低孔低渗储层。切六区E31油藏平均孔隙度为14.4%,平均渗透率为35.1mD,为低孔低渗储层。切六区E1+2油藏平均孔隙度为9.1%,平均渗透率为10.2mD,天然裂缝发育；切十二区E31油藏平均孔隙度为10.5%,平均渗透率为3.8mmD,为特低孔低渗储层。为增加产量,很多油井投产时进行了压裂措施,增加了人工裂缝。昆北油田于2011年开始注水开发,由于非均质性严重,注入水延裂缝突进,在油层中产生优势通道,导致油井含水急剧上升,产量迅速下降,甚至造成油井暴性水淹,降低了水驱效率、影响了采收率。针对此情况引入了注水井深部调剖技术,并针对调剖区块的温度、矿化度及油藏情况,通过实验对调剖剂的体系进行了详细筛选与论证,在此基础上进一步对调剖层位、调剖剂、调剖方式进行了优化与决策。通过现场实施,注水压力得到了提高,吸水剖面得到明显改善,见效井组增油13181吨。
[Abstract]:Kunbei Oilfield belongs to low porosity and low permeability reservoir. The average porosity and permeability of E31 reservoir are 14.4mm and 35.1mDrespectively, which are low porosity and low permeability reservoir. The average porosity and permeability of E2 reservoir are 9.1 and 10.2mD, respectively, and the average porosity of E31 reservoir is 10.5mm and the average permeability is 3.8mmD, which is very low porosity and low permeability reservoir. In order to increase production, many wells have been fracturing when put into production, adding artificial fractures. Due to the serious heterogeneity, the injection water extended fracture burst into the reservoir, which led to the rapid increase of water cut, the rapid decline of production, and even the sudden flooding of oil wells, due to the waterflooding began in 2011 in Kunbei Oilfield. The efficiency of water flooding is reduced and the recovery factor is affected. In view of this situation, the deep profile control technology of water injection well is introduced, and according to the temperature, salinity and reservoir situation of profile control block, the system of profile control agent is screened and demonstrated in detail through experiments, and on the basis of this, the profile control layer is further compared. Profile control agent, profile control method for optimization and decision-making. Through the field implementation, the injection pressure has been raised, the water absorption profile has been obviously improved, and the oil production of the effective well group has been increased by 13181 tons.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE348

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