玛湖致密油藏水平井双井同步压裂技术

2022年 44卷 第6期
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Dual-well simultaneous fracturing technology for horizontal wells of Mahu tight oil reservoir
孟磊峰 屈刚 曾从良 刘晓东 徐传友 王立新
MENG Leifeng QU Gang ZENG Congliang LIU Xiaodong XU Chuanyou WANG Lixin
西部钻探工程有限公司井下作业公司 西部钻探工程有限公司
Downhole Operation Company, CNPC Xibu Drilling Engineering Co., Ltd., Karamay 834000, Xinjiang, China CNPC Xibu Drilling Engineering Co., Ltd., Urumchi 830000, Xinjiang, China
为了进一步提高压裂效率,降低压裂成本,在玛湖四井平台进行了双井同步压裂试验,即采用1套压裂车组对4口井及以上的多井平台中的2口井同时进行压裂作业。与同区块相同水马力传统拉链式压裂施工相比,双井同步压裂完井时间缩短45%,日均施工效率提高70%,但由于地质因素、工程因素和设备因素造成双井同步压裂施工不能同步,每段仅两簇的射孔设计导致孔眼堵塞引发施工压力突升,桥塞失封和移位造成施工压力突降。对目前存在问题分析后指出双井同步压裂实施还需在布井及钻井规划、核心设备升级和射孔方案优化等方面进一步攻关,形成适用于国内非常规油气田开发的双井同步压裂技术模板。
To improve the fracturing efficiency and reduce the fracturing cost, the testing of dual-well simultaneous fracturing was performed for four-well pads of Mahu. Specifically, the fracturing operation was performed simultaneously using the same group of fracturing trucks for two wells of a multi-well pad containing four or more wells. Compared with the conventional zipper fracturing operation with the same hydraulic horsepower in the same block, the testing presents a time reduction of well completion by 45% and the growth of the daily average operation efficiency by 70%. However, geologic, engineering and equipment factors resulted in the failure to synchronize well fracturing, the design with only two perforation clusters in one fracturing stage led to perforation plugging and abrupt rising of operation pressure, and the failure and movement of bridge plugs caused sudden drops of treatment pressure. Analysis of the current challenges indicates that the practice of dual-well simultaneous fracturing requires more work in planning well placement and drilling operations, upgrading core equipment and optimizing the perforating scheme, to form a dual-well synchronous fracturing technology template suitable for domestic unconventional oil and gas development.
玛湖四井平台; 双井同步压裂; 拉链式作业; 同步压裂; 施工效率;
four-well pad of Mahu; dual-well simultaneous fracturing; zipper fracturing; simultaneous fracturing; operation efficiency;
10.13639/j.odpt.2022.00.013