工区内共钻井10口,均钻遇侏罗系沙溪庙组,有5口井在沙溪庙组产气,产量从几千立方米到几万立方米不等,其中qx10井产量最高,日产天然气5.74万m3。工区侏罗系沙溪庙组气藏受河流-湖泊三角洲沉积体系下的分流河道、河口坝砂体及裂缝综合控制,储层横向变化大,气藏纵横向分布规律复杂,受岩性、构造多种因素综合控制,为构造背景上的岩性气藏。研究的目的是弄清各含气砂层组及可疑含气砂层组的砂体分布规律及范围,落实气藏各含气砂体厚度、面积,为储量计算提供可靠参数。在研究中,先用自然伽玛测井参数反演预测砂岩厚度,然后利用中子-声波测井曲线交会重构含气特征曲线预测含气砂岩厚度。结果表明,利用测井曲线重构技术并结合其它方法预测含气砂岩厚度,效果较好,这是一种值得探索的新方法。

There are 10 wells were drilled to Jurassic system Shaximiao formation in the work area, there are 5 wells produce natural gas, the production from thousands  cubic meters to tens thousands cubic meters, The production of qx10 well is the highest, it produce 57.4×10+3 m+3 natural gas per day. In the work area, the Jurassic system Shaximiao gas reservoir is dominated by distributaries channel sand, mouth bar sand of river-lake delta depositional system and fracture. The lateral change of the reservoir is fast, distribution rule of the gas reservoir is complex in vertical and horizontal direction. The gas reservoir is dominated by lithology and tectonic action etc. It is a lithological gas reservoir base of structural setting. The research goal is clarify the sand body distribution regularity and its distribution area of gas-bearing formations and questionable gas-bearing formations, ascertain the thickness and area of every gas-bearing sand body, provide reliable parameter to calculation of reserves. In the course of research, first of all, use the method of natural gama well logging parameter inversion predict the thickness of sand, then utilizing neutron-acoustic well logging curve intersection to reconstruct the gas-bearing attribute curve predict the thickness of gas-bearing sand. The result indicate that utilize this method combine with other method to predict the thickness of gas-bearing sand have better effect. This is a new valuable method for research.