POSSIBILITY STUDY OF HYDRATE FORMATION IN RESERVOIRS OF THE NORTH-EASTERN PART OF THE INDIGIRKA-ZYRYANKA TROUGH

Q4 Earth and Planetary Sciences Geology and Mineral Resources of Siberia Pub Date : 2023-11-01 DOI:10.20403/2078-0575-2023-4a-37-42
D. M. Petrov, A. Sivtsev, I. I. Rozhin
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Abstract

The paper gives a brief description of geological section of the Indigirka-Zyryanka trough, promising for oil and gas, and the results of parametric drilling. Possibility study of hydrate formation in reservoir conditions of trough as one of the reasons for obtaining negative well test results was conducted. Performed calculations of the equilibrium conditions of hydrate formation have determined that the hydrate stability zone covers an insignificant interval of deposits 222 m thick below the bottom of permafrost rocks. It is concluded that the main reason for the insignificance of the hydrate formation zone is a relatively high geothermal gradient, which causes sufficiently high reservoir temperatures in the section. It is noted that favorable conditions for the formation of gas hydrates may arise in the presence of heavy differential pressure drawdown on the formation in the vicinity of borehole.
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因迪吉尔卡-日扬卡海槽东北部储层水合物形成的可能性研究
论文简要介绍了具有开采石油和天然气前景的因迪吉尔卡-日扬卡(Indigirka-Zyryanka)槽谷的地质剖面以及参数钻探结果。对槽谷储层条件下水合物形成的可能性进行了研究,这也是油井测试结果不理想的原因之一。对水合物形成的平衡条件进行的计算确定,水合物稳定区覆盖了永久冻土层岩石底部以下厚度为 222 米的矿床的微小区间。结论是,水合物形成区不明显的主要原因是地热梯度相对较高,导致该段储层温度足够高。据指出,在钻孔附近的地层出现严重压差缩减时,可能会产生形成天然气水合物的有利条件。
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来源期刊
Geology and Mineral Resources of Siberia
Geology and Mineral Resources of Siberia Earth and Planetary Sciences-Geology
CiteScore
0.30
自引率
0.00%
发文量
23
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