Abstract
The glutenite reservoirs discovered in the Jiyang depression in Bohai Bay contribute greatly to proven oil and gas resources, which have reached 1.27 billion cubic meters. Both insufficient studies on the glutenite distribution and incomplete understanding of the corresponding geology restrict further oil energy extraction. Hence, it is necessary to study the controlling factors of glutenite development. Sedimentation, tectonic faults, geophysical data, etc., was used in this paper to study these factors. Four main controlling factors involved in the development of glutenite fan bodies have been studied and summarized: the fault ramp controls the glutenite fan, the fault characteristics control the glutenite acreage, the fault throw controls the thickness of the glutenite, and the dimensions of the incised valleys control the glutenite transport capacity. Based on this geological understanding, this paper analyzes the relationship between oil productivity data and the factors controlling conglomerate development. With this, the reservoir in the study area is divided into a high production area, medium production area, and low production area. The C913 well was deployed in the predicted high production area. The daily oil production reached 88 t/d, and the energy exploitation effect was good. Therefore, this study provides important guidance for the further extraction of oil energy.
Highlights
The glutenite body is a kind of block-like geological rock body, which is composed of sandstone or conglomerate [1,2]
The glutenite reservoirs have a variety of rock types, such as sandstone, conglomerate, muddy conglomerate, sandy mudstone, etc
The tectonic style and its activity patterns have caused obvious differences in the corresponding glutenite type [28,29,30,31,32], development scale, and reservoir performance. Specific faults and their combinations control the development of particular sand bodies and hydrocarbon reservoirs, and the types of boundary faults can be divided into planar fault, listric fault, step fault, and rampflat fault [33,34]
Summary
The glutenite body is a kind of block-like geological rock body, which is composed of sandstone or conglomerate [1,2]. The glutenite reservoirs have a variety of rock types, such as sandstone, conglomerate, muddy conglomerate, sandy mudstone, etc. It can be developed as a single fan body or a group of fans superimposed together, and is usually developed in the steep slope zone of a continental faulted. Glutenite oil and gas reservoirs are generally close to their provenance and have many development stages [3]. The lithology of glutenite reservoirs changes rapidly, the reservoir connectivity is difficult to describe, and exploration and development are difficult [5,6,7,8]. To predict the distribution of glutenite bodies, it is first necessary to systematically study the characteristics and control factors of glutenite development
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