塔里木盆地顺南地区超深白云岩储层地震、地质综合预测

doi:10.11743/ogg20200106

Abstract

Abstract:

Aiming at understanding the geological characteristics and seismic responses and identifying the play fairway of dolomite reservoirs in Shunnan area, the core, logging and test data of wells in Shunnan and its adjacent areas were integrated to study the petrological characteristics of the Lower Yingshan Formation(Ordovician)-Upper Cambrian. The micro-cracks/fractures and dolomite intercrystalline (dissolved) pores were identified to be the main reservoir space in the dolomite, and the formation of the dolomite reservoir was jointly controlled by various factors, including sedimentary facies and paleogeomorphology, deep hydrothermal modification, faulting and fracturing. The petrophysical parameters of limestone, dolomite, calcarenite, micrite and dolomitic limestone were obtained through a statistical analysis of cores and well logging data in the Lower Yingshan Formation of the Ordovician-Upper Cambrian. A seismic geological model of the target reservoir in the area was established in combination with 3D seismic data and geological calibration to the drilling data. A comparison analysis of the forward modeling results and actual seismic data with seismic geological model revealed that the seismic facies featuring low frequency, medium high amplitude and good continuity are markers of play fairway of dolomite reservoir. The combination of feature analysis of seismic wave forms and energy attribute prediction can be applied to effectively identify dolomite reservoirs, thus providing a basis for target evaluation and exploratory well emplacement in Shunnan area.

Key words: ultra-deep reservoir, strike-slip fault, dolomite, Ordovician, Shunnan area, Tarim Basin

CLC Number:

TE122.2

Zongjie Li, Peng Wang, Xuyun Chen, Yingtao Li. Integrated seismic and geological prediction of ultra-deep dolomite reservoir in Shunnan area, Tarim Basin[J]. Oil & Gas Geology, 2020, 41(1): 59-67.

Figures/Tables 9

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井号	岩心编号	岩性	地震波纵波速度/(m·s^-1)
井号	岩心编号	岩性	第1次	第2次	第3次
W1	1	灰质条带泥岩	6 168.4	6 198.6	6 198.6
W1	2	深灰色灰岩	6 317.9	6 413.1	6 317.9
W2	5	灰色含白云质泥晶灰岩	5 933.2	5 834.2	5 834.2
W3	1	灰色砂屑泥晶灰岩	6 250.2	6 200.7	6 225.3
W3	3	灰色泥晶灰岩	5 850.8	5 938.3	5 894.2
W4	1	灰色含砂灰岩	6 127.0	6 195.2	6 229.8
W4	2	灰色泥晶灰岩	6 280.9	6 191.6	6 262.8
W5-2	4	深灰色钙质细晶白云岩	4 874.1	4 891.9	4 891.9
W18	3	黑灰色灰质云岩	6 097.5	5 990.5	6 001.5
W17	1	灰色灰质云岩	5 979.4	6 051.2	5 979.4
W601	2	褐灰色藻白云岩岩	5 135.5	5 095.9	5 095.9

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Integrated seismic and geological prediction of ultra-deep dolomite reservoir in Shunnan area, Tarim Basin

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