Natural Gas Geoscience ›› 2021, Vol. 32 ›› Issue (4): 540-550.doi: 10.11764/j.issn.1672-1926.2020.11.022

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Formation conditions and main controlling factors of hydrocarbon accumulation of the upper Wuerhe Formation of Permian in Zhongguai Uplift, Junggar Basin

Niu-niu ZOU1,2(),Da-quan ZHANG3(),Ji-an SHI4,Xin-chuan LU4,Shun-cun ZHANG4   

  1. 1.College of Resources and Environment Engineering,Guizhou University,Guiyang 550025,China
    2.Key Laboratory of Karst Georesources and Environment,Ministry of Education,Guizhou University,Guiyang 550025,China
    3.Guizhou Research Institute of Petroleum Exploration & Development,Guiyang 550004,China
    4.Northwest Institute of Eco?Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
  • Received:2020-07-17 Revised:2020-11-25 Online:2021-04-10 Published:2021-04-09
  • Contact: Da-quan ZHANG E-mail:niuniu9728@126.com;daquan0807@163.com
  • Supported by:
    The National Natural Science Foundation of China(41802174);the Natural Science Foundation of Guizhou Province, China(Grant No. [2019]1119);the Academic Seedling Cultivation and Innovation Exploration Project of Guizhou University 2017(Grant No.[2017]7285);the Young Talent Introduction Program of Guizhou University(Grant No.(2016)82);the Talent Base Project of Guizhou Province, China(RCJD2018-21)

Abstract:

Based on the analysis of main oil-source, evaluation of geological setting and controlling factors of hydrocarbon accumulation, combined with core observation, thin section identification, well logging and core logging, physical property data, this paper studied formation conditions and main controlling factors of hydrocarbon accumulation of the upper Wuerhe Formation of Permian in Zhongguai Uplift, Junggar Basin. The results show that Zhongguai Uplift, set in the high part of regional location, developed three large hydrocarbon generating centers, which results in abundant petroleum resources and becomes the dominant migration direction area of oil and gas. Hydrocarbon accumulation is controlled by the favorable reservoir-caprock combinations composed of sub-aqueous distributary channel conglomerate and their superimposed pro-fan delta mudstone microfacies, lacustrine mudstones in the upper Wuerhe Formation. Five effective reservoir traps under the dual control of structure and formation are formed. Therein, adequate and stable supply of oil source, the dominant migration direction is the physical basis of hydrocarbon accumulation. The development of fan delta sedimentary system and conglomerate reservoirs controls the scale of oil-gas pool, the stratigraphic unconformity- faults-overlap pinchout traps in updip direction control the vertical distribution of oil and gas.

Key words: Junggar Basin, Wuerhe Formation, Oil and gas accumulation, Pool-forming condition, Main controlling factor

CLC Number: 

  • TE122.1

Fig.1

Regional location of upper Wuerhe Formation of Permian in Zhongguai Uplift of Junggar Basin"

Fig.2

Lithologic integrated histogram and reservoir-caprock of upper Wuerhe Formation in the study area"

Fig.3

Reservoir characteristics and reservoir interspace types of upper Wuerhe Formation in the study area"

Fig.4

The porosity-permeability of upper Wuerhe Formation of Permian in Jinlong 2 well area of Zhongguai Uplift"

Fig.5

The lithologic profile of upper Wuerhe Formation in the study area"

Fig.6

Top surface structural map of P3w2 in Jinlong 2 well area of Zhongguai Uplift"

Table 1

The elements of reverse faults of P3w in Jinlong 2 well area of Zhongguai Uplift"

断层

编号

断层名称

断层

性质

断开层位

目的层断距

/m

断裂产状
走向倾向延伸长度/km
1金龙2井南断裂P1j—P3w5~15NWSW7.3
2金龙2井北1号断裂P1j—P3w5~20NWNE4.7
3金龙2井北2号断裂P1j—P3w10~25NWSW15.7
4金龙2井东断裂P1j—P3w10~20NEE4.2
5克102井西断裂P1j—P3w5~15NENW4.0
6金201井南1号断裂P1j—P3w5~15NWN1.5
7金201井南2号断裂P1j—P3w5~10EWN0.9
8金204井西2号断裂P1j—P3w5~15NSW2.6
9金204井东断裂P1j—P3w5~20NWSW5.8
10金204井南1号断裂P1j—P3w5~20NWNE4.2
11金204井南2号断裂P1j—P3w5~20EWS1.8
12克101井南2号断裂P1j—P3w5~20EWS5.9
13红3井东断裂J—P20~350EWN18.4

Fig.7

Reservoir profile map of upper Wuerhe Formation in the study area"

Fig.8

Distribution characteristics of sedimentary facies of upper Wuerhe Formation in the study area"

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