针对深层油气藏埋藏深、高温高压、低孔低渗、非均质性强等特点,提出采用暂堵分层分段与转向的改造工艺提高储集层动用程度,实现高效改造。研发了耐高温、高强度、可降解纳米酯类系列暂堵材料,开展模拟实验验证改造方法的可行性并对暂堵材料进行性能评价,最终形成了基于化学方法的暂堵转向高效改造增产技术,解决了高温高压深层油气藏机械工具分层分段改造风险大、施工成本高的问题。该技术已在中国10个深层油气田规模应用211井次,平均单井增产是常规技术的3.5倍。该技术的应用提高了储集层动用程度与改造效果,同时降低了施工难度和改造风险,大幅削减了分层分段改造施工成本。图13表1参19
To tackle the challenge of great depth, high pressure and high temperature (HPHT), low permeability and porosity, serious heterogeneity in deep oil/gas reservoirs, this paper proposed high efficiency reservoir stimulation based on temporary plugging & diverting, which can realize multi-stage stimulation to improve stimulated rock volume (SRV) without mechanical isolating tools. A series of degradable nanometer ester temporary plugging material with high temperature resistance and high strength has been developed. The feasibility of the method was tested by modeling experiment, and the performance of the plugging material was evaluated. The high efficiency stimulating technology based on chemical plugging & diverting can avoid the problems of high cost and high risk operations by mechanical isolating tools in HPHT deep wells. This technology has been applied in 211 wells from 10 deep oil/gas reservoirs in China, with average production increment per well 3.5 times higher than conventional technologies. This technology enhanced reservoirs production and stimulation effect, lowered the operation difficulty and risk, and decreased multi-stage stimulation cost for deep reservoirs.
[1] 李永平, 王永辉, 程兴生, 等. 高温深层非均质性碳酸盐岩水平井分段改造技术[J]. 石油钻采工艺, 2014, 36(1): 107-111.
LI Yongping, WANG Yonghui, CHENG Xingsheng, et al.Segmented reconstruction technique of high-temperature deep heterogeneous carbonate horizontal well[J]. Oil Drilling & Production Technology, 2014, 36(1): 107-111.
[2] 赵泽辉, 徐淑娟, 姜晓华, 等. 松辽盆地深层地质结构及致密砂砾岩气勘探[J]. 石油勘探与开发, 2016, 43(1): 12-23.
ZHAO Zehui, XU Shujuan, JIANG Xiaohua, et al.Deep strata geologic structure and tight conglomerate gas exploration in Songliao Basin, East China[J]. Petroleum Exploration and Development, 2016, 43(1): 12-23.
[3] 潘先念. 高温深层碳酸盐岩储集层酸化压裂改造技术浅议[J]. 石化技术, 2016, 23(3): 97.
PAN Xiannian.Acid fracturing in high temperature deep layer carbonate reservoir[J]. Petrochemical Industry Technology, 2016, 23(3): 97.
[4] 李熙喆, 郭振华, 胡勇, 等. 中国超深层构造型大气田高效开发策略[J]. 石油勘探与开发, 2018, 45(1): 111-118.
LI Xizhe, GUO Zhenhua, HU Yong, et al.Efficient development strategies for large ultra-deep structural gas fields in China[J]. Petroleum Exploration and Development, 2018, 45(1): 111-118.
[5] 姜必武, 慕立俊. 低渗透油田重复压裂蜡球暂堵剂性能研究[J]. 钻采工艺, 2006, 29(6): 114-116.
JIANG Biwu, MU Lijun.Study on the performance of wax-bead temporary blocking agent used for refracturing in low-permeability reservoir[J]. Drilling & Production Technology, 2006, 29(6): 114-116.
[6] HOUCHIN L R, DUNLAP D D, HUDSON L M, et al.Evaluation of oil-soluble resin as an acid diverting agent[R]. SPE 15574, 1986.
[7] STRASSNER J E, TOWNSEND M A, TUCKER H E.Laboratory/field study of oil-soluble resin-diverting agents in Prudhoe Bay, Alaska, acidizing operations[R]. SPE 20622, 1990.
[8] 赖南君, 陈科, 马宏伟, 等. 水溶性压裂暂堵剂的性能评价[J]. 油田化学, 2014, 31(2): 215-218.
LAI Nanjun, CHEN Ke, MA Hongwei, et al.Performance evaluation of water soluble temporary plugging agent for fracturing[J]. Oilfield Chemistry, 2014, 31(2): 215-218.
[9] 成梅华. 水溶性暂堵剂的研究与应用[J]. 石油化工应用, 2015, 34(4): 91-93.
CHENG Meihua.Study and application of water soluble temporary plugging agent[J]. Petrochemical Industry Application, 2015, 34(4): 91-93.
[10] 严锦根, 汤志强, 王兆水. 新型水溶性暂堵剂JYDⅡ的研制与应用[J].油田化学, 2000, 17(1): 24-27.
YAN Jingen, TANG Zhiqiang, WANG Zhaoshui.Water soluble temporarily plugging agent JYD-Ⅱ: Preparation and uses[J]. Oilfield Chemistry, 2000, 17(1): 24-27.
[11] KENNEDY D K, KITZIGER F W, HALL B E.Case study on the effectiveness of nitrogen foams and water zone diverting agents in multistage matrix acid treatments[R]. SPE 20621, 1992.
[12] BERNADINER M G, THOMPSON K E, FOGLER H S.Effect of foams used during carbonate acidizing[R]. SPE 21035, 1992.
[13] ZERHBOUB M, TOUBOUL E, BEN-NACEUR K, et al.Matrix acidizing: A novel approach to foam diversion[R]. SPE 22854, 1994.
[14] 周福建, 熊春明, 刘玉章, 等. 一种地下胶凝的深穿透低伤害盐酸酸化液[J]. 油田化学, 2002, 19(4): 322-324.
ZHOU Fujian, XIONG Chunming, LIU Yuzhang, et al.A clean hydrochloric acidizing fluid of deep penetration and low damage owing to in-situ gelation at elevated pH value[J]. Oilfield Chemistry, 2002, 19(4): 322-324.
[15] ZHOU F.Application and study of acid fracture technique using novel temperature control viscosity acid in carbonate reservoir, Tarim[R]. SPE 104446, 2006.
[16] ZHOU F, XIONG C, SHI Y, et al. Study on a self-diverting acid system for well stimulation based on novel visco-elastic surfactant[J]. Advanced Materials Research, 2011, 287-290: 3120-3126.
[17] 董明键, 郭先敏, 李子良. 可降解材料在完井工具中的应用及发展趋势[J]. 石油机械, 2015, 43(3): 31-34.
DONG Mingjian, GUO Xianmin, LI Ziliang.Application and future development of degradable materials in completion tools[J]. China Petroleum Machinery, 2015, 43(3): 31-34.
[18] 周长忍, 丁珊, 李立华. 可降解材料的制备及应用研究进展[J]. 中华创伤骨科杂志, 2000, 2(4): 317-319.
ZHOU Changren, DING Shan, LI Lihua.Research progress of preparation and application of degradable materials[J]. Chinese Journal of Orthopaedic Trauma, 2000, 2(4): 317-319.
[19] 陈国强. 生物可降解材料产业现状与趋势分析[J]. 新材料产业, 2007, 12: 42-46.
CHEN Guoqiang.Industry status and trend analysis of biodegradable material[J]. Advanced Materials Industry, 2007, 12: 42-46.
