An integrated evaluation approach on dry hole analysis: A case study of Ballat anticline, Naccowlah Block, Eromanga Basin, Queensland, Australia. Issue 8 (10th May 2022)

• Record Type: Journal Article
• Authors: Khan, Haris Ahmed; Naqvi, Syed Danial Mehdi; Abbas, Ayesha; Khan, Muhammad Jahangir; Faisal, Muhammad; Gabol, Muhammad Fahad
• Is Part Of: Geological journal. Volume 57:Issue 8(2022)
• Page Start: 3008
• Page End: 3020
• Publication Date: 2022-05-10
• Subjects: Ballat structure -- dry hole analysis -- Eromanga Basin -- Hutton sandstone -- structural restoration -- well logs; Geology -- Periodicals; 551
• DOI: 10.1002/gj.4468
• Languages: English
• ISSNs: 0072-1050

Abstract

Abstract : This study is based on an integrated investigation of seismic, well log, geological and geochemical data, the detailed analysis of source, reservoir, and structures were conducted in the Naccowlah Block, Eromanga Basin, Queensland, Australia. The Naccowlah Block is one of the most important hydrocarbons producing areas centered in Eromanga Basin, with several producing wells, except Ballat‐01 and Chilla‐01. This study pertains specifically to the Ballat structure, which was declared dry. The purpose of this research is to evaluate and identify specific 'Dry Hole' failure, based on analysis of several factors: reservoir deliverability, source maturity, migration, and structural presence. 3D seismic data revealed NE–SW trending series of reverse faulting mainly conquered by four‐way dip closure due to compressional tectonics in the study area. The burial history and event chart depict the preservation and maturation of potential source rock, which is furthermore affirmed by the vitrinite reflectance curve. Interpreted regional migration model and structural analysis of Naccowlah Block stated the presence of a suitable structure for hydrocarbon generation and migration pathways. Despite all favourable aspects for the accumulation of hydrocarbon in Hutton sandstone, the structural restoration analysis proves the absence of trap at the time of migration and accumulation. However, geophysical, geological, and geochemical shreds of evidence suggest that the spatial distribution of the events provides valuable guidance for the development of the area. Abstract : The steps of integrated study have been framed to analyse the reservoir utilizing well data, source via geochemistry data, migration trends through palaeo‐geological maps generation and structure restoration by means of horizon flattening to identify the reason behind the dry holes.