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Nearshore subaqueous fan conglomerate sedimentation unit body division method

A technology of sedimentary unit and subsea fan, applied in geophysical measurement, instruments, etc., can solve the problem of lack of effective guidance in division, and achieve the effect of solving the contradiction of water injection development and improving the efficiency of oil recovery.

Active Publication Date: 2015-12-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

However, high-resolution sequence stratigraphy has good guiding significance for the identification of gradual traction flow sedimentary units, and for the division of nearshore subaqueous fan glutenite sedimentary units controlled by irregular event gravity flow spin-cycle deposition Lack of effective guidance

Method used

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  • Nearshore subaqueous fan conglomerate sedimentation unit body division method
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  • Nearshore subaqueous fan conglomerate sedimentation unit body division method

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0054] Take the subaqueous fan glutenite sedimentary unit division of the nearshore subaqueous fan in the upper sub-member of the fourth member of the Shahejie Formation in the steep slope belt controlled by shovel-type boundary faults in the ×× faulted lake basin of ×× Oilfield as an example. Such as figure 1 Shown, the nearshore subaqueous fan sandy conglomerate depositional unit body division method of the present invention, it contains the following steps:

[0055] Step 1: Establish the division standard of nearshore subaqueous fan glutenite sedimentary units in the steep slope zone of the faulted lake basin.

[0056] (1) Determine the paleogeomorphological characteristics of the nearshore subaqueous fan sedimentation in the study area.

[0057] ×× Oilfield ×× Faulted Lacustrine Basin Steep Slope Zone is a steep slope structural zone cont...

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Abstract

The present invention relates to a nearshore subaqueous fan conglomerate sedimentation unit body division method. The nearshore subaqueous fan conglomerate sedimentary unit body division method under the erratic event gravity flow spin back sedimentation effect control is established, with the accurate division of a rift lake basin steep slope belt nearshore subaqueous fan conglomerate sedimentation unit body as an object, on the basis of the research of a nearshore subaqueous fan sedimentation cause mechanism and a sink sedimentation simulation experiment, nearshore subaqueous fan conglomerate sedimentation unit body division identification and classification standards are established, with the nearshore subaqueous fan conglomerate sedimentation unit body division classification standard as a guidance, the seismic data and drilling data division of a nearshore subaqueous fan sedimentation unit body is carried out, with the seismic data and drilling data division of the nearshore subaqueous fan sedimentation unit body as a basis, with single well time-depth relation as a constraint, the crosswell comparison of the nearshore subaqueous fan sedimentation unit body is developed, the accurate identification and division of the rift lake basin steep slope belt nearshore subaqueous fan conglomerate sedimentation unit body are carried out, the nearshore subaqueous fan conglomerate sedimentation unit body can be accurately and effectively divided, and the spatial distribution range is determined.

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 sandy conglomerate depositional units. 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 made in the nearshore subaqueous fan glutenite oil and ga...

Claims

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Application Information

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IPC IPC(8): G01V11/00
Inventor 王艳忠操应长马奔奔程鑫刘海宁齐明明宋丙慧
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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