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A Method for Identifying Interlayers in Heavy Oil Reservoirs

A technology for interlayer identification and heavy oil reservoirs, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as inability to identify interlayers, and achieve effective quantitative identification effects

Active Publication Date: 2018-04-06
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem in the prior art that the interlayer cannot be accurately identified under complex conditions, the present invention further proposes an interlayer identification method in heavy oil reservoirs

Method used

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  • A Method for Identifying Interlayers in Heavy Oil Reservoirs
  • A Method for Identifying Interlayers in Heavy Oil Reservoirs
  • A Method for Identifying Interlayers in Heavy Oil Reservoirs

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Embodiment 1

[0070] There are interlayers in the sag block of an oilfield. The existence of interlayers affects the development and expansion of steam chambers, the difference in fluid seepage and the effect of thermal recovery. Therefore, the identification of interlayers is very important in the thermal recovery of heavy oil. to combine figure 2 As shown, the interlayer identification methods in this heavy oil reservoir include:

[0071] Step 21, classify the interlayer type of the recessed block.

[0072] On the basis of the core macro data, analysis and testing data and a large number of logging data of nearly ten coring wells in the study area, combined with the dynamic monitoring data of well temperature (combined with image 3 As shown in the well temperature curve, the temperature does not go up at about 640m, indicating that there is an interlayer here), and the interlayer type of the sag block is preliminarily identified and divided. The interlayer type mainly includes two type...

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Abstract

The invention provides an interlayer identification method for a heavy oil reservoir, and belongs to the technical field of petroleum and natural gas exploration and development. The method comprises the following steps: acquiring a well logging response characteristic of a well to be logged; determining the lower threshold value of reservoir physical properties of the well to be logged; performing interlayer quantitative identification on the well to be logged according to the lower threshold value of the reservoir physical properties and the well logging response characteristic. According to the interlayer identification method for the heavy oil reservoir, a specific well logging response characteristic is compared with the lower threshold value of the reservoir physical properties, so that qualitative identification of a muddy interlayer, a physical property interlayer and a heavy oil reservoir is realized; therefore, the interlayer in a thick-extra-thick heavy oil reservoir can be subjected to the quantitative identification effectively.

Description

technical field [0001] The invention relates to a method for identifying interlayers in heavy oil reservoirs, and belongs to the technical field of petroleum and natural gas exploration and development. Background technique [0002] For areas rich in heavy oil resources, there are usually problems such as complex geological conditions, diverse reservoir types, and uneven distribution of interlayers in the reservoir. Difficulties in the study of heterogeneity. Especially in heavy oil thermal recovery blocks such as steam flooding, SAGD (Steam Assisted Gravity Drainage, steam assisted gravity drainage), fire burning, etc., the interlayer acts as a seepage barrier and affects the vertical or lateral flow of the liquid and gas (steam) phases in the sand body. Seepage capacity, an important factor affecting the development and expansion of steam chambers. However, in the prior art, there is no corresponding technical solution to accurately identify the interlayer under the abov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 马成龙于兰兄崔洁杨彦东荐鹏杨新标刘雨欣韩竹
Owner PETROCHINA CO LTD
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