Acid fracturing for complex fractures in fractured-vuggy reservoirs in Tahe oil field
-
摘要: 缝洞体是塔河油田油气的主要储集空间，通过酸压工艺沟通缝洞体是实现这类油藏高效开发的主要手段。侧钻井放空、漏失现象揭示在井周不同方位均发育缝洞体。由于酸压人工裂缝延伸方向主要受控于最大水平主应力方向，造成非主应力方向上的缝洞体沟通困难。增加酸压裂缝复杂程度是提高井周不同方位缝洞体沟通的有效措施。通过建立复杂天然裂缝条件下人工裂缝延伸模型，评价了不同岩石参数对裂缝复杂程度的影响：摩擦系数 > 水平应力差 > 逼近角 > 岩石抗张强度 > 内聚力。研究形成了复杂缝酸压配套工艺技术并开展5井次现场应用，平均单井增油5 909.7 t。Abstract: The main reservoir types in Ordovician carbonate formation in Tahe oil field are dissolution fractures and caves. Acid fracturing is one of the main methods of oil field development. Venting and leakage during sidetracking show that a lot of caves distributed nearby, but not connected to well because of single acid fracture extending direction. Increasing the complexity of acid fracturing may contribute to improve the probability of link between well and caves which distributed along different directions. A fracture extending compute model is proposed under the conditions of complex natural fracture. Different rock mechanic parameters which have influence on fracture's complexity are assessed:friction coefficient > horizontal stress difference > approximation angle > tensile strength > cohesion. Acid fracturing for complex fractures is applied in 5 wells, obtaining 5 909.7 t oil in average for each well.
-
[1] 耿宇迪,张烨,米强波.超深、高破压碳酸盐岩储层深度酸压改造技术研究与应用[J].石油与化工设备,2010,12(13):33-36. [2] 江夏,张烨.塔河油田缝洞型碳酸盐岩油藏深度改造技术研究与应用[J].油气地质与采收率,2010,17(6):107-110. [3] 米卡尔J.埃克诺米德斯,肯尼斯G.诺尔特.油藏增产措施[M].北京:石油工业出版社,2001:71-106. [4] 贾长贵,路保平,蒋廷学,等.DY2HF深层页岩气水平井分段压裂技术[J].石油钻探技术,2014,42(2):85-90. [5] 赵金洲,王松,李勇明.页岩气藏压裂改造难点与技术关键[J].天然气工业,2012,32(4):46-49. [6] 陈守雨,杜林麟,贾碧霞,等.多井同步体积压裂技术研究[J].石油钻采工艺,2011,33(6):59-65. [7] 胡永全,贾锁刚,赵金洲,等.缝网压裂控制条件研究[J].西南石油大学学报(自然科学版),2013,35(4):126-132. [8] 翁定为,雷群,李东旭,等.缝网压裂施工工艺的现场探索[J].石油钻采工艺,2013,35(1):59-62. [9] 陈勉,金衍,张广清.石油工程岩石力学[M].北京:科学出版社,2008:225-237. -
计量
- 文章访问数: 901
- HTML全文浏览量: 132
- PDF下载量: 133
- 被引次数: 0
下载:
苏公网安备32021102000780号