中江气田致密砂岩气藏“一体化”甜点评价技术

doi:10.11885/j.issn.1674-5086.2022.01.27.03

摘要/Abstract

摘要： 中江气田沙溪庙组气藏整体呈“三隆夹两凹”的构造格局，构造高部位的“三隆”区已经实现高效开发，但构造低部位“两凹”区河道甜点评价技术尚不完善。针对现有地质甜点着重评价储层品质，而含气性预测依赖地震解释，且多解性强的问题，将成藏与地震研究相结合，形成含气性预测精度更高的地质甜点预测技术。在地质甜点评价基础上，对甜点进行分类评价，明确各类甜点的特点与差异，建立与之相适应的工程改造技术，形成针对性的工程甜点评价技术。深化深源浅聚次生气藏的差异化成藏研究，多学科融合，形成“地质甜点”与“工程甜点”有机融合的“一体化”甜点评价技术。基于一体化甜点评价结果，结合水平井体积压裂新工艺，突破了常规储层下限，大幅提高了单井产能，实现了“两凹”区的有效动用开发。“一体化”甜点评价技术可有效评价压裂新工艺所适宜的低品质河道，推动气藏更低部位、更差储层河道的建产开发。

关键词: 致密砂岩气藏, 差异化成藏, 地质甜点, 工程甜点, 一体化甜点

Abstract: The gas reservoir of Shaximiao Formation in Zhongjiang Gas Field has a structural pattern of two depressions surrounded by three uplifts. The three uplift area in the high structure part has been developed efficiently, but the evaluation technology of the channel sweet in spot two depressive structural low areas needs further study. Aiming at the problem that the existing geological sweet spot study focuses on reservoir quality evaluation, but the gas prediction depends on seismic interpretation and has strong multi-solution, the technology of geological sweet spot prediction with higher accuracy is formed by combining reservoir formation and seismic research. Based on the evaluation of geological sweet spots, engineering sweet spots evaluation, which is used to evaluate the adaptability of hydraulic fracturing technology, is conducted firstly. Then, taking on the research of the differential accumulation of deep-source and shallow-gathering secondary gas reservoirs, the integrated sweet spot prediction technology is established by taking both geological sweet spot and engineering sweet spot into consideration. And combining the new fracturing technology, the limit of conventional reservoirs of geological sweet spots can be lower, the rate of gas well can be significantly increased, thereby the two depressive area can be developed effectively. The integrated sweet spot prediction technology can be used to evaluate low quality rivers which is more suitable for the new fracturing technology, so the rivers in lower structural areas and with more poor physical properties can be developed.

Key words: tight sandstone gas reservoir, differentiated accumulation, geological sweet spot, engineering sweet spot, integrated sweet spot

中图分类号:

TE377

刘言. 中江气田致密砂岩气藏“一体化”甜点评价技术[J]. 西南石油大学学报(自然科学版), 2022, 44(3): 12-25.

LIU Yan. Integrated Sweets Spots Evaluation Technology for Tight Sandstone Gas Reservoirs in Zhongjiang Gas Field[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(3): 12-25.

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