Comprehensive prediction of turbidite reservoir of Shahejie Formation in the south of Qikou Depression, Bohai Bay Basin

Marine Origin Petroleum Geology ›› 2020, Vol. 25 ›› Issue (1) : 89-96.

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ISSN 1672-9854
CN 33-1328/P
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Marine Origin Petroleum Geology ›› 2020, Vol. 25 ›› Issue (1) : 89-96.
Technology and Applications

Comprehensive prediction of turbidite reservoir of Shahejie Formation in the south of Qikou Depression, Bohai Bay Basin

  • TAN Jiancai,ZHANG Chunhua,ZHANG Mingwei,LIU Tian,SHAO Yuan
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Abstract

A set of lacustrine turbidite fan deposit was developed in the Paleogene Shahejie Formation in the south of Qikou Depression, Bohai Bay Basin. The sandstone reservoir is characterized by small distribution range, rapid change and thin interbedding of sandstone and mudstone. Based on the recognition of sequence stratigraphic framework and reservoir genetic type, combined with the vertical fine logging data and lateral intensive seismic data, the "three-step" seismic reservoir prediction was comprehensively carried out, including seismic attribute analysis, well logging constrained inversion and geostatistical inversion. It is shown that sandbodies are superimposed and distributed continuously along with the direction of sediment source, but change rapidly and are mostly lenticular while being perpendicular to the direction of sediment source. Under the control of the footwall in the south of the turbidite fan, the sandbodies in the south are generally thick, and the turbidite channel sandbodies are also relatively thick. The application effect shows that the "three step" reservoir comprehensive prediction technology of seismic attribute analysis, well logging constrained inversion and geostatistical inversion, is more suitable for fine reservoir prediction under the condition of sparse well network and large well spacing.

Key words

words:turbidite; seismic attributes analysis; well logging constrained inversion; geostatistical inversion; reservoir prediction; Shahejie Formation; Qikou Depression

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Comprehensive prediction of turbidite reservoir of Shahejie Formation in the south of Qikou Depression, Bohai Bay Basin[J]. Marine Origin Petroleum Geology. 2020, 25(1): 89-96
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