随钻测井在地层评价上的作用

Benefits of LWD for formation evaluation in Dulang west field

在１９２７～１９７８年间，石油工业一直依赖电缆测井获取岩石物性分析所需的储层数据。此后，出现了随钻测井（ＭＷＤ），但其性能价格比低。最近６年中，出现了一种名为定向与随钻测井仪器（ＬＷＤ），它不但能提供电阻率、中子、密度及伽马射线测量值，可靠性明显提高，且价格很吸引人，尤其是当钻井／完井或井迹保证困难时更能显示出其威力。随钻测井在ＤＵＬＡＮＧ西油田广泛应用，文中对比了传统电缆测井与其所获数据在质量与成本上的差异。

Ever since the first electric log was run in 1927, the oil industry relied on wireline-conveyed logging for the acquisition of formation data. It was not until 1978 that the first measurement while drilling (MWD) tool was introduced in the field, but its reliability was not impressive and its cost was unattractive. However, over the last 6 years, the drilling services have shifted their focus to icgging while drilling (LWD). Significant improvement in the reliability of the tools and competitive price, as compared to conventional wireline iogging,have offered advantages in running LWD in the fields. This paper discusses the benefits of using LWD for formation evaluation in the development of Dulang West field. A comparison between the wireline - conveyed and LWD data acquired in this field is also presented.