大型整装异常高压气田开采技术研究――以克拉2气田为例

克拉2气田位于塔里木盆地北缘,该气田具有规模大、整装、气柱高、异常高压、单井产量高和完井工艺难度大等特点。针对克拉2气田的这些特点,研制了一整套高效开采技术,包括:高陡山地构造精细地震解释技术,巨厚砂岩储层精细三维地质建模技术,异常高压高产气藏产能评价技术,异常高压气藏岩石变形特征对开发影响研究技术,巨厚气藏完井工艺技术,山前高陡构造钻井防斜提速技术和高压气井防气窜固井技术。这一技术系统的形成为西气东输主力气田――克拉2气田的开发奠定了基础,对类似的其它高压气田的开发也有借鉴作用。

DEVELOPMENT TECHNOLOGY FOR ABNORMAL HIGH PRESSURE AND LARGE SCALE MONO-BLOCK GAS FIELD :TAKING KELA 2 GAS FIELD AS THE EXAMPLE

Kela 2 gas field is a world level gas field located in the north edge of Tarim basin which is characterised with large scale,monoblock, high gas column, abnormal high pressure, high well rate, difficulty in well completion and etc. In order to develop Kela 2 gas field with high efficiency, a series of gas field production techniqueses were fromed through research work which include: detailed three-dimensional geologic model forming technology for high steep structure and very thick sandstone reservoir, productivity evaluation technology for abnormal high pressure and large volume gas field, rock transmutation prediction for abnormal high pressure gas reservoir, perforating and completion technology for thick gas reservoir, anti-leaning and increasing drilling speed technology for super high pressure and steep structure gas reservoir, anti gas channeling cement technology for high pressure gas field, gas production technology for large sized tubing string. The achievements of these researches have settled the foundation for the development of Kela 2 gas field which is the main source of west to east gas transmission project, and will be taken as a reference for the development of other similar high pressure gas fields.