Rock Characteristics and Engineering Logging Identification Method of “Slope Rock Stratum” in the Metamorphic Buried Hill of Block JZ in Bohai Bay Basin
Abstract: There developed a suite of thinner sandy conglomerate and sandstones (slope rock stratum) over the interface of metamorphic granite buried hill in Block JZ of Bohai Bay Basin. The slope rock stratum was distributed with different thicknesses. Its lateral comparison was poor, by which problems were induced in drilling operations. The lithologic characteristics of the slope rock were analyzed based on core and cuttings data. The rock layer was divided into feldspathic sandstone and lithic sandstone, which indicated that the slope rock stratum was the sandstone of two different geneses. Based on analysis of engineering logging parameters and lithologic response characteristics of the formation, the parameters of drilling engineering are used to establish work index and mechanical specific energy models and combined with other logging means, the slope rock in the buried hill is identified in real-time while drilling. This method is used in several wells in the block with an identification rate of while drilling to 86.7%. It is proven that the method is effective.
文章引用: 谭伟雄 , 徐 昱 , 张志虎 , 王建立 , 郭喜佳 , 董国富 (2017) 渤海JZ区块变质岩潜山“坡积岩层”岩石特征及工程录井识别方法。 石油天然气学报， 39， 182-188. doi: 10.12677/JOGT.2017.394053
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