开发地震技术在榆林南区开发布井中的应用

APPLICATION OF DEVELOPMENT SEISMIC TECHNIQUES IN ARRANGING DEVELOPMENT WELLS AT THE SOUTH PART IN YULIN GAS FIELD

榆林气田南区上古生界山 2段气藏属于低孔低渗河流三角洲砂岩隐蔽气藏 ,2 0 0 0年以来在勘探阶段摸索出的榆林区上古生界山 2段砂岩储层地震横向预测技术系列基础上 ,筛选并推广地震地质综合分析布井的实用经验 ,并使其在 2 0 0 1年天然气产建中发挥了重要的作用 ,大幅度提高了气田开发的经济效益。和过去相比 ,不单纯追求技术上的新、奇 ,而注重研究各种方法的适应性、实用性 ,然后针对不同开发井位的具体部署 ,采取行之有效的方法 ,利用波形特征分析和STRATA反演技术在储层厚度定量预测的基础上 ,进行储层物性的定性—定量预测 ,综合过井测线AVO特征分析最终预测储层的含气性 ,多方法有机的结合起来使用 ,提高了钻井的成功率。

Shan-2 gas reservoir in Upper Paleozoic at the south part of Yulin gas field belongs in a subtle low-permeability fluviodelta sandstone gas reservoir.On the basis of the seismic lateral prediction technical series Shan-2 sandstone reservoir in Upper Paleozoic at Yulin region which bave been summarized in exploration stage since 2000,the well arrangement experience of comprehensive seismic-geological analysis was selected and popularized,and it played an important role in increasing gas production in 2001,thus greatly raising the economic returns of gas field development.By comparison with the past,the new and strange techniques are not only sought but the applicability and practicality of various methods are emphatically studied.The following effective method is often adopted for concretely deploying individual development well.On the basis of quantitatively predicting reservoir thickness by use of wave character analysis and STRATA inversion technique,a qualitative-quantitative prediction of petrophysical property may be carried out and the gas potential of the reservoir can be predicted finally in light of comprehensively analyzing the AVO characteristics on the seismic sections passing through wells.Therefore it is an effective way for raising drilling success ratio to use various methods synthetically.