Method for division and comparison of effective connected bodies of nearshore subaqueous fan glutenite

Abstract

The invention relates to a dividing and contrasting method of near-shore underwater fan glutenite effective connected bodies. Based on water tank sedimentation simulation experiments, plane and profile distribution characteristics of a near-shore underwater fan glutenite sedimentation unit body are determined; with the guidance of the distribution characteristics, determined by the simulation experiments, of the near-shore underwater fan glutenite sedimentation unit body, a practical geological body is divided into sedimentation unit bodies by means of well-seismic combination; slice data and core data are comprehensively utilized, the types of sedimentary-diagenetic comprehensive facies, a well logging identification method of the sedimentary-diagenetic comprehensive facies is established, and the spatial distribution of the sedimentary-diagenetic comprehensive facies is determined; physical property responses of different types of sedimentary-diagenetic comprehensive facies are established, the spatial distribution of the reservoir properties is determined; and physical property boundaries of the effective connected bodies are determined, and the spatial distribution of the effective connected bodies is determined. By adopting the method, the extension range of the near-shore underwater fan glutenite effective connected bodies can be accurately and effectively determined, the disposition of a well network and the making of a development scheme are effectively guided, and the water-flooding efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploration and development, and in particular relates to a method for dividing and comparing effective connected bodies of sandy conglomerate near the shore underwater fan. Background technique [0002] The nearshore subaqueous fan in the steep slope zone of the faulted lake basin refers to various depositional processes such as episodic activities of basin-controlling faults and climate-controlled debris flows, paroxysmal mountain floods, and mountain rivers during flood intervals during the period of lake transgression and high water level Deep-water conglomerate fans distributed close to faults formed by sedimentation. The near-shore subaqueous fan glutenite body in the steep slope of the faulted lake basin is closely adjacent to the deep lacustrine source rock, and has an excellent source-reservoir-cap matching relationship. In recent years, major breakthroughs have been ma...

AI Technical Summary

Problems solved by technology

[0007] (2) The spatial distribution of physical properties of sedimentary units is difficult to predict

[0008] (3) The division standard of effective connected objects is not clear

From the above, it can be seen that the effective connected body is a relatively independent permeable layer, and the permeable layer is a relative concept, which will change with the change of fluid properties and development conditions; These factors make it difficult to determine the effective connected body division standard

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