川东板东构造长兴组生物礁及其地震特征研究

根据板东构造板东4井等长兴组钻探资料，对长兴组的生物礁进行了研究。研究表明板东构造长兴组储集岩有生物（屑）泥晶灰岩-含生物（屑）泥晶灰岩、礁灰岩和白云岩。综合储集岩物性特征、区域钻、测井资料及野外剖面，总结了生物礁的形成与演化模式及模式各部位所对应的岩性和物性。通过地震响应特征、反演等技术建立了长兴组储层识别模式，利用对应速度、Landmark属性提取的储层有效厚度经计算机网格化编制出了长兴组储层厚度分布预测图，与钻测井厚度对比，证实板东4井生物礁为点礁。

Study of organic reef of Changxing Formation in Bandong structure of the east of Sichuan Basin

According to log data of Bandong 4 well in Changxing Formation in Bandong structure of the east of Sichuan Basin, reservoir rocks and organic reef of Changxing Formation were studied in this paper. The research indicated that there are biomicrites, reef limestones, and dolomites in reservoir rocks. By means of reservoir rock＇s physical property, areal logging data and field sections, model of organic reef＇s formation and evolution was summarized. Identification model of reservoir in Changxing Formation has been established by means of seismic response characteristics and inversion technology, and thickness distribution of reservoir was computed by computer using corresponding velocity and effective thickness of reservoir extracted by Landmark software. Compared with drilling depth, it was proved that organic reef in Bandong 4 well was point reef.