Petroleum Science >2015,??Issue 3:??391-405 DOI: https://doi.org/10.1007/s12182-015-0045-6
Factors influencing physical property evolution in sandstonemechanical compaction: the evidence from diagenetic simulationexperiments Open?Access
文章信息
School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China Department of Geosciences, University of Oslo, Oslo 0316, Norway;School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China;School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China;School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China;School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China;Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China;School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China;School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China;School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China;School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China
文章摘要
sandstone mechanical compaction and its physical property
evolution during compaction processes, simulation experiments
on sandstone mechanical compaction were carried
out with a self-designed diagenetic simulation system. The
experimental materials were modern sediments from different
sources, and the experiments were conducted under
high temperature and high pressure. Results of the experiments
show a binary function relation between primary
porosity and mean size as well as sorting. With increasing
overburden pressure during mechanical compaction, the
evolution of porosity and permeability can be divided into
rapid compaction at an early stage and slow compaction at
a late stage, and the dividing pressure value of the two
stages is about 12 MPa and the corresponding depth is
about 600 m. In the slow compaction stage, there is a good
exponential relationship between porosity and overburden
pressure, while a good power function relationship exists
between permeability and overburden pressure. There is
also a good exponential relationship between porosity and
permeability. The influence of particle size on sandstone
mechanical compaction is mainly reflected in the slow
compaction stage, and the influence of sorting is mainly
reflected in the rapid compaction stage. Abnormally high
pressure effectively inhibits sandstone mechanical compaction,
and its control on sandstone mechanical compaction
is stronger than that of particle size and sorting.
The influence of burial time on sandstone mechanical
compaction is mainly in the slow compaction stage, and the
porosity reduction caused by compaction is mainly controlled
by average particle size.
关键词
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Primary porosity Mechanical compaction Unconsolidated sand Diagenetic simulation experiment