Dolomization and influence on reservoir development in deep-burial stage:A case study of Lower Paleozoic in Tarim Basin

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  • Research Institute of Petroleum Exploration and Development,CNPC,Beijing 100083,China

Received date: 2015-06-01

  Revised date: 2015-07-27

  Online published: 2019-09-20

Abstract

Lower Paleozoic strata of Tarim Basin were buried deeply in most of the late history.Understanding the formation and transformation of dolomite and the impacts on reservoir areimportant to deep petroleum exploration.Based on the study of Cambrian and Lower Ordovician Penglaiba Formation dolomite,we can get two conclusions.First,most of the Lower Paleozoic dolomite in Tarim Basin formed before deep burial stage.In deep burial stage,magnesium-rich residual evaporation brine and hydrothermal fluid cause burial dolomitization.Second,burial dolomitization generally results in recrystallizationof dolomite which will make crystal larger.Besides,higher strata temperatureleads to overgrowth of dolomite which will occupyoriginal porosity.

Cite this article

Liu Wei, Huang Qing-yu, Wang Kun, Shi Shu-yuan . Dolomization and influence on reservoir development in deep-burial stage:A case study of Lower Paleozoic in Tarim Basin[J]. Natural Gas Geoscience, 2016 , 27(5) : 772 -779 . DOI: 10.11764/j.issn.1672-1926.2016.05.0772

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