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Crystals 2018, 8(2), 84; https://doi.org/10.3390/cryst8020084

The Carbonate Platform Model and Reservoirs’ Origins of the Callovian-Oxfordian Stage in the Amu Darya Basin, Turkmenistan

1
Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
2
School of Geosciences and Technology, Southwest Petroleum University, Chengdu 610500, China
3
Exploration and Development Research Institute of PetroChina Southwest Oil & Gasfield Company, Chengdu 610051, China
*
Authors to whom correspondence should be addressed.
Received: 21 November 2017 / Revised: 21 January 2018 / Accepted: 29 January 2018 / Published: 4 February 2018
(This article belongs to the Special Issue Carbonates)
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Abstract

The Calloviane-Oxfordian carbonates in the northeastern Amu Darya Basin of southeastern Turkmenistan are composed of medium- to thick-bedded, mostly grainy limestones with various skeletal (bivalves, brachiopods, echinoderms, foraminifera, corals, and sponge) and non-skeletal grains (intraclasts, ooids and peloids). Two facies zones, six standard facies belts and some microfacies types were recognized, and sedimentary model “carbonate ramp-rimmed platform” was proposed and established that can be compared with the classical carbonate sedimentary models. In this model, favorable reservoirs not only developed in the intraplatform shoal of open platform, or reef and shoal on the platform margin, but also in the patch reefs, shoal and mound facies on the upper slope. The reservoir’s pore space is dominated by intergranular and intragranular pores and fissure-pore reservoirs exist with medium porosity and medium to low permeability. Sedimentary facies and diagenetic dissolution are the key controlling factors for the development of high-quality reservoirs. View Full-Text
Keywords: sedimentary model; Callovian-Oxfordian; Amu Darya Basin; reservoir; main controlling factors sedimentary model; Callovian-Oxfordian; Amu Darya Basin; reservoir; main controlling factors
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Xu, W.; Wen, H.; Zheng, R.; Li, F.; Huo, F.; Hou, M.; Zhou, G. The Carbonate Platform Model and Reservoirs’ Origins of the Callovian-Oxfordian Stage in the Amu Darya Basin, Turkmenistan. Crystals 2018, 8, 84.

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