Depositional characteristics of fan delta deposits and their impacts to reservoir development-An example from Liaohe Basin

CHEN Huanqing; WANG Jue; HU Haiyan; DU Yijing; FAN Tao

doi:10.16562/j.cnki.0256-1492.2018.05.015

2018 Vol. 38, No. 5

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Article navigation > Marine Geology & Quaternary Geology > 2018 > 38(5): 156-170

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CHEN Huanqing, WANG Jue, HU Haiyan, DU Yijing, FAN Tao. Depositional characteristics of fan delta deposits and their impacts to reservoir development-An example from Liaohe Basin[J]. Marine Geology & Quaternary Geology, 2018, 38(5): 156-170. doi: 10.16562/j.cnki.0256-1492.2018.05.015

Citation:

CHEN Huanqing, WANG Jue, HU Haiyan, DU Yijing, FAN Tao. Depositional characteristics of fan delta deposits and their impacts to reservoir development-An example from Liaohe Basin[J]. Marine Geology & Quaternary Geology, 2018, 38(5): 156-170. doi: 10.16562/j.cnki.0256-1492.2018.05.015

Depositional characteristics of fan delta deposits and their impacts to reservoir development-An example from Liaohe Basin

1.
Research Institute of Petroleum Exploration and Development, Petro China, Beijing 100083, China
2.
Petrochina Exploration and Development Company, Beijing 100007, China
3.
Institute of Exploration and Development, PetroChina Liaohe Oilfield Company, Panjin 124010, China

Received Date: 01 July 2016

Revised Date: 29 August 2016

Publish Date: 28 October 2018

Abstract

Abstract

The Yulou oil bearing sets from one of the experimental areas in the south end of western slope of the West Depression of the Liaohe Basin is selected in this paper as a case to study the depositional characteristics of a fan delta and their impacts to reservoir development. Core and slice data, geochemical data of seven wells and logging data for 400 wells in addition to seismic data are collected for interpretation. On the basis of the high resolution stratigraphic framework, sedimentary facies are identified and described. At the same times, the influences of sedimentary facies to reservoir development are analyzed. The target layer is divided into 29 single sublayers according to well data and seismic data. The conclusion of facies analysis of the target layer is further confirmed as a fan delta front by lithology, beddings, colour of mudstone, fossil assemblage and grain size distribution patterns. Sediments came from NW and north. Five types of sedimentary facies, i.e. the underwater distributary and channel sands, river mouth bar, underwater distributary channel mudstone and delta front sheet-like sand are well developed in the study area. In general, underwater distributary channel and underwater distributary channel sand dominate the sequence with the river mouth bar and delta front sheet-like sand as the next. From the bottom single layer of yII36b to the top single layer of yI11a, the target layer shows an inversed cyclic characteristic and becomes coarsening up from bottom to top. Effected by frequent rechannelization of underwater distributaries, sandstone deposits become more heterogeneous. Distribution pattern and composition of depositional facies should be sufficiently considered in thermal recovery of oil with steam.
- West Depression in Liaohe Basin /
- Yulou oil bearing sets /
- sedimentary microfacies /
- fan delta front /
- reservoir development

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References

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