Development later-stage complex fault block fine stratigraphic comparison method based on well-to-seismic alternation

A technology for stratigraphic comparison and complex fault blocks, which is applied in the fields of seismology, seismology, and seismic signal processing for logging records. promising effect

Active Publication Date: 2022-06-07
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0007] The main purpose of the present invention is to provide a fine stratum correlation method for complex fault blocks in the later stage of development based on well-seismic alternation. The method of the present invention solves the problems of difficult well correlation and serious well-seismic contradictions in complex fault block areas with high sand-to-ground ratio and no marker layers , to divide strata more finely and accurately, and clarify the distribution of remaining oil in complex fault blocks

Method used

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  • Development later-stage complex fault block fine stratigraphic comparison method based on well-to-seismic alternation
  • Development later-stage complex fault block fine stratigraphic comparison method based on well-to-seismic alternation
  • Development later-stage complex fault block fine stratigraphic comparison method based on well-to-seismic alternation

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Embodiment 1

[0043] as Figure 1 As shown, based on the well seismic alternation of fine strata in the late stage of development of complex faults, including the following steps:

[0044] Step 101, perform well seismic level calibration, and perform layer tracking and interpretation of large layers and landmark sand groups; The seismic data are interpreted, and the plane spread law of the fault is clarified through the seismic properties, the location of the large fault ridge is described in detail, and the preliminary tectonic model is established, and the step enters 102.

[0045] Step 102, using the method of sequence stratigraphy, combined with geological sedimentary characteristics, referring to the seismic sequence sedimentary characteristics and fault development of the seismic profile, with the help of regional and local markers for preliminary comparison of stratigraphic formations, step 103.

[0046]Step 103, the preliminary geological stratification data is added to the seismic reser...

Embodiment 2

[0054]Taking the 38 fault block located in the middle of the Yinan fault zone of Shaojia Oilfield as an example, the fault block is a nose-shaped structure pulled by the Guantao Formation-Dongying Formation of the Yinan Large Fault Falling Disk, and the two-step fault block clamped by the south and north faults is wide in the east and narrow in the west, and the strata are high in the north and low in the south. The fault block is cut into multiple oil-bearing small faults by multiple secondary faults, and the faults play an important role in controlling the distribution of oil and gas and water. The pottery group of the block is a river facies deposition, with a high sand-to-ground ratio, no stratigraphic contrast markers, serious stratigraphic faults, difficult stratigraphic contrasts, and contradictions between adjacent wells. The current problems in the block are that the fault system is complex, the geological basic research is not perfect, the research of the overall system ...

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Abstract

The invention relates to a complex fault block fine stratigraphic comparison method in the later period of oil reservoir development, in particular to a well-to-seismic alternation-based complex fault block fine stratigraphic comparison method in the later period of development. The method comprises the steps of establishing a preliminary construction model; performing stratum preliminary comparison by means of regional and local marks; well seismic fine horizon calibration is carried out, all-region horizon tracking is carried out, seismic attributes are utilized to guide identification and description of low-order faults, and a fine structure model is established; well-seismic combination is carried out, well-seismic alternate fine stratigraphic comparison is carried out, and well-seismic contradiction is solved; carrying out whole-region fine closing interpretation, and drawing a structural map; and drawing a small-layer plane graph, checking stratigraphic comparison data, and if problems exist, adjusting layering or structure to solve oil-water development contradictions. The method provided by the invention solves the problems of difficult well comparison and serious well-to-seismic contradiction of a complex fault block area with high sand-to-ground ratio and no marker bed, more finely and accurately divides the stratum, and clarifies the distribution rule of the remaining oil of the complex fault block.

Description

Technical field [0001] The present invention relates to a detailed formation comparison method for complex faults in the late stage of reservoir development, specifically to a fine formation comparison method based on the alternation of well earthquakes in the late stage of complex faults. Background [0002] In the late stage of development of complex fault oil reservoirs, it is increasingly difficult to tap the potential of potential residual oil, and the requirements for reservoir description are getting higher and higher, and it is necessary to carry out fine and accurate formation division and clarify the enrichment law of residual oil of complex faults. With the continuous deepening of oil and gas exploration and development in China, many advanced stratigraphic comparison technologies have been formed. From the small layer comparison technology of "cyclic comparison, hierarchical control, and group-based" created in the early Daqing Battle and the comparison of high-resolu...

Claims

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Application Information

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IPC IPC(8): G01V1/50
CPCG01V1/50G01V2210/6169G01V2210/624
Inventor 谭琴辉陶国秀王建宋力薛玉荣李媛媛黄超邓兴房环环周海庭
Owner CHINA PETROLEUM & CHEM CORP
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