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Method for identifying and comparing stratums by using element comparison relationship

An element and stratum technology, applied in earthwork drilling, special data processing applications, measurement, etc., to achieve the effect of guiding trajectory adjustment, improving drilling encounter rate, and improving stratum identification efficiency

Inactive Publication Date: 2020-11-24
CNPC BOHAI DRILLING ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for stratum identification and comparison using the elemental comparison relationship, use the element stability index to identify and divide strata and oil groups, guide on-site drilling construction, and overcome the problem of element logging technology based on single data. Or the problem of stratum identification and division with multiple data, avoiding multiple solutions in the application of element logging data, improving drilling timeliness, and effectively improving the timeliness and effectiveness of decision-making in the drilling process

Method used

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  • Method for identifying and comparing stratums by using element comparison relationship
  • Method for identifying and comparing stratums by using element comparison relationship

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Embodiment 1

[0048] A method for stratum identification and comparison using elemental correlation, including the following specific steps:

[0049] Step 1. Collect the element logging data in the adjacent well GD8, including the relative contents of Ca, Mg, Al, Fe, Si, TI, and Mn elements;

[0050] Through this step, the element logging data of Well GS 8 at 3816-4070m was collected.

[0051] Step 2. Establish the elemental stability index curve of GD8, summarize the morphological characteristics and quantitative characteristics of the elemental stability index according to the model, and form the bottom layer and characteristic summary.

[0052] Through this step, it can be concluded that the element stability index form from the well depth of GD8 well 3816-3890m presents a zigzag rising shape, and the bottom is in the shape of a small knife edge. This well section is determined as S1, and S1 is divided into four sublayers S1- From 1 to S1-4, the curve of S1-1 layer (3816-3830m) presents...

Embodiment 2

[0065] A method for stratum identification and comparison using elemental correlation, comprising the following specific steps:

[0066] Step 1. Collect the elemental logging data of adjacent wells, including the relative contents of Ca, Mg, Al, Fe, Si, TI, and Mn elements;

[0067] Step 2. Establish the element stability index model of adjacent wells, summarize the morphological characteristics and quantitative characteristics of the element stability index according to the model and formation information, and form the bottom layer and characteristic summary.

[0068] Step 3. Obtain the element logging data of the well through the element logging work of drilling QY2H, calculate the element stability index of the drilling well, and summarize the morphological characteristics and quantitative characteristics of the element stability index of the drilling well;

[0069] Step 4.t compares the morphological characteristics and quantitative characteristics of the element stability...

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Abstract

The invention discloses a method for identifying and comparing stratums by using an element comparison relationship. The method comprises the following steps of collecting element logging data of a well adjacent to a drilled well, and calculating the relative content of each element logging; establishing an element stability index curve of the adjacent well; obtaining element logging data in welldrilling through element logging work in well drilling, calculating an element stability index in well drilling, summarizing and concluding morphological characteristics of the element stability indexin well drilling and summarizing quantitative characteristics; comparing the element stability index morphological characteristics and quantitative characteristics of the drilling well and the adjacent well, and identifying the drilling position of the drilling well; and judging the drilling condition of a target stratum of the drilled well, and forming stratum position description of the drilledstratum. According to the method, data fitting is carried out by using data in an element logging technology to form a method for stratum identification and comparison by using the element comparisonrelationship, and the method is mainly used for on-site exploration and development of oil and gas fields.

Description

technical field [0001] The invention relates to data fitting by using the data in the element logging technology to form a method for stratum identification and comparison using the element contrast relationship, which is mainly used for on-site exploration and development of oil and gas fields, and belongs to the category of oil and gas industry exploration and development logging while drilling Application field of well data processing technology. Background technique [0002] At present, the rapid development of drilling technology has caused a huge impact on the mud logging industry. Accurate lithology identification cannot be carried out based on finely divided powdery cuttings. On-site stratigraphic division work. However, in the application of element logging technology, data analysis only stays at the content changes of a single data or several data to determine the physical and chemical properties of rocks, and it is impossible to accurately divide the stratigraphi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B47/00G06F30/20
CPCE21B47/00E21B49/00G06F30/20
Inventor 陈贺熊正祥袁保清张会民郭青松黄万国刘永泉王刚
Owner CNPC BOHAI DRILLING ENG
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