Source Rock Evaluation of the Shale Beds Penetrated by Kinasar-1 Well, Se Bornu Basin, Nigeria

• 作者: Peter Sunday Ola
• 来源期刊: 地质学期刊(英文)
• 学科: 地球科学
• 关键词: Bornu BASIN Gas Kinasar Source Rock UNCONFORMITY
• 年，卷（期）: dzxqkyw_2018,（11）
• 页码范围: 1056-1068
• 页数: 13页
• 分类号: P61

摘要

This paper investigates the hydrocarbon generation potential of the shale beds penetrated by Kinasar-1 well in the SE depression of the Bornu Basin, Nigeria. The objective of the study was to select shale sample from the ditch cuttings of the well and assess their source rock status based on the integration of four routinely used indicators: TOC, HI, Tmax, and VR. While all the strata analysed contain sufficient organic matter (TOC > 0.5) for hydrocarbon generation, the HI/Tmax plot suggests slightly matured to matured type II/III kerogen that is capable of generating only gas as revealed by the HI/TOC plot. Of tectonic significance is the Vitrinite reflectance result, which suggests cooling, based on observed VR reversal at depth. This is interpreted herein as marking a period of uplift and erosion that is totally different from and occurred before the intra-Maastrichtian unconformity that affected all the basins of WACRS.