靖边气田沟槽高精度综合识别技术

靖边气田广泛分布的沟槽对天然气富集和钻井成功率的影响很大,在目前低密度地震测网条件下,常规解释方法难以准确识别二、三级沟槽的分布和形态。以钻井、试井资料及生产数据为验证和约束条件,直接建立沟槽与地震属性之间的相关关系,实现以地震属性分析为主导、动静结合的沟槽综合识别新方法,在靖边气田沟槽识别中取得了较好的应用效果,共识别出一级沟槽16条,二级沟槽83条,三级沟槽206条,走向以EW—NEE为主,局部走向存在偏转。该识别结果目前已在实际钻探中得到初步验证。实践表明,该方法可显著提高沟槽的识别精度。图6表2参8

High-precision integrative recognition technology for flutings in Jingbian Gasfield, Ordos Basin

Both the gas enrichment and the drilling success were seriously influenced by the extensive flutings in Jingbian Gasfield,Ordos Basin.The distribution and shape of the second-and third-order sub-flutings were hard to be determined by common interpretation methods under the current low-density seismic grid.A new method of fluting recognition is presented which is dominated by seismic attributes and combined with both static and dynamic information from drilling,well testing and production.More than 16 main flutings,83 second-order flutings,206 third-order flutings have been identified by this method in Jingbian Gasfield,and these flutings mainly strike towards EW-NEE,with local deflexion.Successful drilling show that the method can improve the precision of fluting recognition.