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Research on sand fracturing technology of Sulige gas field
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摘要: 苏里格气田以其巨大的储量以及“低渗、低压、低丰度、低产”四低的特征举世瞩目，?过4年来的探索与实践，已?形成了规模性的开发模式，水力压裂则是气井投产必须的重要措施。用裂缝延伸净压力拟合的方法获取裂缝参数，在产能拟合的基础上进行单井产能分析和预测，以地层岩石力学参数为基础并在考虑井口安全条件的基础上发展了独特的分层压裂工艺，利用低伤害发泡型N2增能压裂液解决了气井返排困难的问题，降低了储层伤害。该技术在苏里格气田苏5、桃7区块中的应用已超过300口井，平均无阻流量18.37×104 m3/d，无阻流量大于100×104 m3/d的井13口，单井最高无阻流量131.62×104 m3/d，气田增产效果显著。Abstract: Sulige gas field attracts worldwide attention with its enormous reserves, as well as “low-permeability, low pressure, low abundance, and low yield” features. Through four years of exploration and practice, a development model with large scale has been formed. Hydraulic fracturing is an important approach to putting gas wells into production. The approach of net pressure fitting for crack extension is used to obtain fracture parameters. Single well productivity analysis and forecast are conducted on the basis of productivity fitting. Based on rock mechanics parameters of the formation, considering the safety condition of the well head, unique separate layer fracturing technology is developed. The use of low-damage N2 foaming fracturing fluid helps solve the problem of difficult flowback of fracturing fluid in gas wells, and reduced damage to the reservoir. The technology has been applied to more than 300 wells, with the average AOF being 18.37×104 m3/d. The AOF of 13 wells exceeds 100×104 m3/d, and the maximum AOF of single well reaches 131.62×104 m3/d. The effectiveness of stimulating is remarkable.
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[1] ［1］LEI Qun, LU Tao, et al. Advanced hydraulic fracturing treatments in the wushenqi low-permeability gas field: a workflow to minimize the learning curve［R］. SPE 93 192，2005.
［2］KENNEDY J H, MCELHINEY J E. Pressure transient analysis of tight western gas sands -pre- and post- fracruring［R］. SPE 7933，1979.
［3］COLOMBO I, FANELLO G. History match and reserve evaluation of hydraulically fractured wells: low permeability field case history［R］. SPE 114 219, 2008.
［4］GRINGARTEN A C, RAMEY A J. Unsteady-state pressure distributions created by a well a single-infinite conductivity vertical fracture［J］. SPE, 1974,（8）: 347.
［5］CINCO-LEY H, SAMANIEGO V J. Transient pressure analysis for fractured wells［J］. JPT, 1981,（4）: 1749.
［6］郑云川，陶建林.苏里格气田储层改造的“三封四压”配套技术［J］.天然气工业，2007，27（12）：102-104.
ZHENG Yunchuan, TAO Jianlin. Technology of multi-packing & multi-fracturing in Sulige gas field［J］. Natural Gas Industry, 2007, 27（12）: 102-104.
［7］陈馥，李钦. 压裂液伤害性研究［J］.天然气工业，2006，26（1）：109-111.
CHEN Fu, LI Qin. A study of formation damage of fracturing fluid［J］. Natural Gas Industry, 2006, 26（1）: 109-111.
［8］GUPTA D V S, BOBIER D M. The history and success of liquid CO2 and CO2/N2 fracturing system［R］. SPE 40 016, 1998. ［1］LEI Qun, LU Tao, et al. Advanced hydraulic fracturing treatments in the wushenqi low-permeability gas field: a workflow to minimize the learning curve［R］. SPE 93 192，2005.
［2］KENNEDY J H, MCELHINEY J E. Pressure transient analysis of tight western gas sands -pre- and post- fracruring［R］. SPE 7933，1979.
［3］COLOMBO I, FANELLO G. History match and reserve evaluation of hydraulically fractured wells: low permeability field case history［R］. SPE 114 219, 2008.
［4］GRINGARTEN A C, RAMEY A J. Unsteady-state pressure distributions created by a well a single-infinite conductivity vertical fracture［J］. SPE, 1974,（8）: 347.
［5］CINCO-LEY H, SAMANIEGO V J. Transient pressure analysis for fractured wells［J］. JPT, 1981,（4）: 1749.
［6］郑云川，陶建林.苏里格气田储层改造的“三封四压”配套技术［J］.天然气工业，2007，27（12）：102-104.
ZHENG Yunchuan, TAO Jianlin. Technology of multi-packing & multi-fracturing in Sulige gas field［J］. Natural Gas Industry, 2007, 27（12）: 102-104.
［7］陈馥，李钦. 压裂液伤害性研究［J］.天然气工业，2006，26（1）：109-111.
CHEN Fu, LI Qin. A study of formation damage of fracturing fluid［J］. Natural Gas Industry, 2006, 26（1）: 109-111.
［8］GUPTA D V S, BOBIER D M. The history and success of liquid CO2 and CO2/N2 fracturing system［R］. SPE 40 016, 1998. -
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