A Workflow for Shale Play Exploration and Exploitation

Muhammad Hanif Khan, Warda Yousaf, Bilal Sadaqat, Naila Javed, Abdulrahman Olukade
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Abstract

This article aims to give an outline of an integrated geoscience approach that may apply in the initial identification of the shale play, address complex unconventional reservoirs, their associated challenges and finalise the pilot vertical wells to evaluate their potential. Shale exploration depends on the proven source rock within the basin, so the availability of the required data, well data and seismic data in public domain for initial study and basin screening is usually easy. The investigation may start after knowing the well developed proven source rock in the basin. An extensive study of structure, tectono-stratigraphy, source rock and reservoir characterization, thermal maturity models and exploration strategy is required by using the regional tectonic history, drilled wells with multiple penerations in source rock, open-hole logs, mud samples and cores of the source rock to get the answers to the critical questions on the attributes that influence shale plays. Once these attribute questions have been satisfactorily confirmed to be in the required range or with an analog, that data can be utilized to locate possible sweet spots to drill pilot vertical wells with the goal of acquiring extensive coring, open hole logging and formation pressure testing data to identify the best candidates for further horizontal well evaluation. This article highlights and demonstrates a possible step by step workflow for the selection of the shale play area, sweet spot and pilot vertical wells locations by using the schematic data maps, published material examples and building possible cut offs essential for exploration decision process.
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页岩储层勘探开发工作流程
本文旨在概述综合地球科学方法,该方法可用于页岩储层的初步识别,解决复杂非常规储层及其相关挑战,并最终确定试验直井以评估其潜力。页岩勘探取决于盆地内已探明的烃源岩,因此在公共领域获得所需的数据、井数据和地震数据进行初步研究和盆地筛选通常很容易。在了解盆地内已探明的烃源岩发育情况后,可开展勘探工作。通过区域构造史、烃源岩多穿井、裸眼测井、泥浆样品和烃源岩岩心,对构造、构造地层学、烃源岩和储层特征、热成熟度模型和勘探策略进行广泛的研究,以获得影响页岩储层属性的关键问题的答案。一旦这些属性问题被令人满意地确认在要求的范围内或具有模拟值,就可以利用这些数据来定位可能的甜点,以钻导直井,目的是获得广泛的取心、裸眼测井和地层压力测试数据,以确定进一步水平井评价的最佳候选。本文通过使用示意图数据图、已发表的材料示例和构建勘探决策过程中必不可少的可能的截断点,重点介绍并演示了页岩区、甜点和试点直井位置的逐步选择工作流程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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