高温高盐油藏可动凝胶-渗吸调驱配方体系研究与应用  

Study and application of displacement formula system movable gel-imbibition for high-temperature and high-salt reservoirs

作　　者：罗文利[1] 马德胜[1] 罗云[2] 王强[1] 巨邦庆[2] 蔡红岩[1] 林庆霞[1] LUO WenLi MA DeSheng LUO Yun WANG Qiang JU BangQing CAI HongYan LIN QingXia(State Key Laboratory of Enhanced Oil Recovery, Research Institute of Petroleum Exploration and Development, Beijing 100083, China Drilling ＆ Production Technology Research Institute Petrochina Qinghai OilfieM Company, Jiuquan 736202, China)

机构地区：[1]中国石油勘探开发研究院,提高石油采收率国家重点实验室,北京100083 [2]青海油田分公司钻采工艺研究院,酒泉736202

出　　处：《中国科学：技术科学》2017年第1期103-110,共8页Scientia Sinica(Technologica)

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目(编号:07-01Z-01-06)资助

摘　　要：通过室内试验,研究了聚合物分子量、聚合物浓度、交联剂用量及pH等因素对耐高温有机交联剂HT-2008与高分子量星形抗温耐盐聚合物CA-2588形成的凝胶黏度和成胶时间的影响,确定了尕斯库勒E_3~1油藏高温高盐可动凝胶调驱体系的基本配方及性能:环境扫描电子显微镜结果表明,高分子量星形抗温耐盐聚合物CA-2588和耐高温有机交联剂HT-2008能够形成稳定的互穿网络体型结构,该可动凝胶体系,在矿化度为117000mg/L(且钙镁离子含量高达3340 mg/L),pH为7.80,实验温度为126℃条件下,5d时黏度达到最高值43900 mPa s,180 d时凝胶黏度为43500 mPas,耐温耐盐性能好,稳定性好;通过考察不同结构的渗吸剂相态、渗吸脱油效率和长期稳定性等因素,确定了适用于尕斯库勒油田E_3~1高温高盐油藏的3种渗吸剂LF1008,AESN70和N111-2.在尕斯库勒油田E_3~1油藏进行可动凝胶.渗吸深部调驱现场应用后,取得良好效果.A novel movable gel for high-temperature and high-salt reservoirs was proposed in this paper. The movable gel consisted of the star-polymer （CA-2588） with temperare-resistance and salt-resistance and organic crosslinking agent （HT-2008）. Systemic investigation was carried out to examine the influence of star-polymer molecular weight, star-polymer concentration, crosslinker dosage, and pH on gel viscosity and gelation time. It was observed clearly by the environmental scanning electron microscope that the interpenetrating polymer network structure was formed within the movable gel. The viscosity of the movable gel （0.2% CA-2588＋0.66% HT-2008） arrived the peak value as 43900 mPa s in brine salinity 117000 mg/L at 126℃. In addition, no obvious decrease in the viscosity of movable gel was found after 180 d. Through the investigation of the factors such as the phase state, the oil removal efficiency and the long term stability of different imbibition agent structure, three imbibition agent LFI008, AESN70 and N111-2 are determined to apply Gasikule E31 high temperature and high salinity reservoir. The movable gel with star-polymer （CA-2588） and organic crosslinking agent （HT-2008） and imbibition agent （LF1008） were used for deep profile control and flooding with movable gel-imbibition agent in Gasikule E31 reservoirs, it achieved the desired effect.

关 键 词：尕斯库勒油田E13油藏 星形抗温耐盐聚合物 耐高温有机交联剂 可动凝胶 渗吸剂 

分 类 号：TE34[石油与天然气工程—油气田开发工程]