本文關(guān)鍵詞：海上油田在線組合調(diào)驅(qū)提高采收率技術(shù)——以渤海C油田E井組為例　出處：《科學(xué)技術(shù)與工程》2017年09期 　論文類型：期刊論文

  更多相關(guān)文章： 海上油田 非均質(zhì)性 在線組合調(diào)驅(qū) 分流量 采收率

【摘要】：針對渤海C油田E井組層間非均質(zhì)性嚴(yán)重、層內(nèi)非均質(zhì)性強的問題,結(jié)合海上油田空間有限、快速開發(fā)等特點,提出以在線交聯(lián)體系作為調(diào)剖段塞、在線非均相體系作為調(diào)驅(qū)段塞的在線組合調(diào)驅(qū)思路。利用不同滲透率雙管填砂模型,考察了乳液聚合物與交聯(lián)劑濃度分別為1 500 mg/L、1 650 mg/L和3 000 mg/L、3 300 mg/L的兩種交聯(lián)體系的調(diào)剖能力,結(jié)果表明,注入0.5 PV的交聯(lián)體系并侯凝5 d后,低濃度對應(yīng)的雙管模型上,低滲砂管的分流量由0%變?yōu)?0%;高濃度對應(yīng)的雙管模型上,高、低滲砂管的分流量相對于前期水驅(qū)階段發(fā)生逆轉(zhuǎn),低滲砂管的分流量由0%變?yōu)?4%,有效抑制了水驅(qū)"優(yōu)勢通道",調(diào)整了層間吸水矛盾。利用均質(zhì)巖心物理模型,在乳液聚合物、微球聚合物和預(yù)交聯(lián)凝膠顆�？倽舛缺３�4 000 mg/L的條件下,考察了水驅(qū)后不同非均相體系驅(qū)油效果;并與乳液聚合物單獨使用時的實驗結(jié)果進行了對比。結(jié)果表明,不同配方的非均相調(diào)驅(qū)體系均大幅提高了采收率,提高采收率幅度隨著預(yù)交聯(lián)顆粒在體系中所占濃度的提高而增大。2016年3月5日,在線組合調(diào)驅(qū)體系在C油田E23井開始注入。先后注入3 440.8 m~3的交聯(lián)體系和10 997 m~3的非均相體系。根據(jù)生產(chǎn)情況分析,調(diào)驅(qū)開始后E24、E27、E36、E28H1、E18、E22取得顯著降水增油效果,截至2016年8月初,通過凈增油法計算,已經(jīng)實現(xiàn)累積增油5 937.1 m~3。
[Abstract]:Aiming at the serious heterogeneity between layers and strong heterogeneity in E well group in Bohai C oilfield, combined with the characteristics of limited space and rapid development of offshore oil fields, the on-line cross-linking system is proposed as a slug for profile control. The on-line heterogeneous phase system is used as the on-line combined control and flooding idea for the slug. The concentration of emulsion polymer and crosslinking agent is 1 500 mg/L by using the dual tube sand filling model with different permeability. The profile control ability of two crosslinking systems of 1 650 mg/L and 3 000 mg / L 3 300 mg/L is obtained. After the crosslinking system was injected with 0.5 PV for 5 days, the flow rate of the low permeability sand pipe changed from 0% to 40 on the two-tube model corresponding to the low concentration. In the dual pipe model with high concentration and low permeability, the split flow of high and low permeability sand pipes is reversed compared with the earlier stage of water flooding, and the flow rate of low permeability sand pipe is changed from 0% to 84, which effectively inhibits the "dominant channel" of water drive. Based on the homogeneous core physical model, the total concentration of emulsion polymer, microsphere polymer and pre-crosslinked gel particles were kept at 4 000 mg/L. The oil displacement effect of different heterogeneous systems after water flooding was investigated. The results are compared with the experimental results when the emulsion polymer is used alone. The results show that the oil recovery is greatly improved by the heterogeneous modulation flooding system with different formulations. The range of oil recovery increased with the increase of the concentration of premixed particles in the system. March 5th 2016. The on-line combined flooding system began to be injected into well E23 in C Oilfield. The crosslinking system of 344.0.8 mm3 and the heterogeneous system of 10997 mm3 were injected successively. The production conditions were analyzed. After the start of the oil flooding, E24 / E27 / E36 / E28H1 / E18 / E22 obtained remarkable effect of precipitation and oil increase. Up to the beginning of 2016, it was calculated by the method of net oil increase. A cumulative increase of 5 937.1 mm3 has been realized.
【作者單位】： 中海油能源發(fā)展工程技術(shù)分公司;中海油海洋石油高效開發(fā)國家重點實驗室;
【基金】：中國海洋石油總公司科研項目(CNOOC-KJ 135 KJXM NFGJ 2016-04) 中海油能源發(fā)展股份有限公司工程技術(shù)分公司科研項目(GCJSXMHT-1617)資助
【分類號】：TE53
【正文快照】： 渤海C油田位于渤中25-1構(gòu)造南界發(fā)育的大斷層下降盤,為明下段斷裂背斜構(gòu)造,地層原油黏度為20~209 m Pa·s,溫度在74.4~76.1℃之間,油藏北塊以巖性油藏為主,南塊以巖性-構(gòu)造油藏為主。C油田新近系儲層孔隙度變化范圍為26.2%~31.7%,平均30.0%,屬于高孔;滲透率分布范圍為676~3 90

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