Diagenesis and Porosity Evolution of Kepingtage Formation in#br#
Shuntuoguole Block

doi:10.11885/j.issn.1674-5086.2015.12.28.03

Abstract

Abstract:

This paper systematically studies the diagenetic types，classification of diagenetic stages and diagenetic sequences，
and builds the porosity evolution process. The study shows that the Kepingtage Formation reservoir in Shuntuoguole area，
mainly consisting of lithic sandstone，the lithic quartz sandstone and feldspathic litharenite，is poor in physical property. The
reservoir，which is predominantly in diagenetic stage A with some parts reaching diagenetic stage B，was mainly controlled
by compaction，cementation，erosion，metasomatism，hydrocarbon charging，and tectonic fracturing. Multiple diagenesis factors
dominated the reservoir pore evolution：compaction was the most influential with average porosity reduction of 21.82%；
cementation was the secondary with porosity reduction of about 8.18% of which calcareous cementation reduced porosity by
6.06%，and silicic cementation reduced porosity by 1.80% while clay cementation gave insignificant influence；bitumen filling
led to 2.53% porosity loss；erosion increased porosity by 3.91%.

Key words: diagenesis, porosity evolution, tight sandstones, Kepingtage Formation, Shuntuoguole block

CLC Number:

TE121

PENG Jun1, ZHANG Hanbing1*, LU Ming2, LI Bin1, XIA Qingsong1. Diagenesis and Porosity Evolution of Kepingtage Formation in#br# Shuntuoguole Block[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2015.12.28.03.

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Diagenesis and Porosity Evolution of Kepingtage Formation in#br# Shuntuoguole Block

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