Integrated horizontal well geosteering method

A geosteering, horizontal well technology, applied in directional drilling, earthwork drilling, wellbore/well components, etc., can solve the problems of complex underground geological conditions, easy target deviation, single geosteering, etc., and achieve timely correction and evaluation. Synchronize, eliminate inaccuracy, and improve the effect of processing ability

Active Publication Date: 2013-04-17
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the underground geological conditions are complex, and the target reservoir is relatively thin, which makes it difficult to hit the target and easy to deviate from the target.
However, based on technical limitations and management aff

Method used

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Examples

Experimental program
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Example Embodiment

[0046] Example 1

Example Embodiment

[0047] As a preferred embodiment of the present invention, it includes the following steps:

[0048] a. Collect 3D seismic data in the service well area, 3D seismic time data in SEGY format, 3D seismic stratification data, and 3D seismic datum elevation data, perform depth conversion and reprocessing of the 3D seismic time data, and finely interpret the structure and reservoir fluid Spread, extract attribute feature values, and clarify target features;

[0049] b. Analyze the adjacent logging data, finely analyze the lithology, oil, gas and water layers, special lithology and small layer marks, fine small layer comparison, clarify the horizontal and vertical distribution characteristics of the reservoir, extract the logging guide scale mark, and establish Standard profile model of fine logging;

[0050] c. Design the trajectory according to the geological target;

[0051] d. Use the underlying ORACLE database of the wellsite remote information platform to load the 3D seismic data and...

Example Embodiment

[0060] Example 2

[0061] As the best embodiment of the present invention, it includes the following steps:

[0062] a. 3D geological modeling

[0063] Collect 3D seismic SEGY data in the service well area, including time data, depth data, seismic stratification data, and seismic datum elevation data. Reprocess seismic data, finely interpret the structure and reservoir fluid distribution, extract attribute feature values, clarify target features, see the results of 3D seismic processing and interpretation figure 1 .

[0064] Detailed description of the reservoir, combined with geological research, adjacent logging data to establish a fine 3D geological model (sedimentary facies, reservoirs, fluids), optimize the geological target, see the 3D geological modeling process figure 2 .

[0065] b. Logging modeling

[0066] Analyze the adjacent logging data, finely analyze the lithology, oil, gas and water layers, special lithology and small layer marks, fine small layer comparison, clarify ...

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Abstract

The invention discloses an integrated horizontal well geosteering method. The integrated horizontal well geosteering method includes the steps of establishing a precise three-dimensional geologic model by geologic data, well logging data, well measuring data and geophysical prospecting data before drilling; designing a three-dimensional track according to a stratigraphic dip and reservoir stratum properties extracted from the three-dimensional model; during drilling, guaranteeing accurate landing and continuously revising the geologic model via tracking while-drilling records and controlling the track; during target drilling, according to combination between while-drilling well recording, while-drilling well measurement combined geological research, seismic interpretation, drilling technology, horizontal well controlling technology, performing while-drilling tracking and explanation evaluation, immediately regulating and forecasting next steps in a horizontal well construction scheme, and realizing field and remote visualized geosteering via an integrated geosteering software system platform.

Description

[0001] technical field [0002] The invention relates to the technical field of drilling exploration and development of oil and natural gas, and more precisely relates to an integrated geosteering method for horizontal wells, which is suitable for drilling horizontal sections of horizontal wells. Background technique [0003] At present, in the field of drilling exploration and development technologies such as oil and natural gas, and in horizontal well operations, logging-while-drilling tools, measurement-while-drilling tools and on-site comprehensive logging tools are used. The measurement-while-drilling tool and the logging-while-drilling tool are located not far from the drill bit, and obtain various data of the formation and wellbore trajectory data while the drilling rig is drilling, including well deviation, azimuth, natural gamma ray, depth and shallow lateral resistance rate etc. The on-site comprehensive mud logging tool obtains drilling time, cuttings, fluorescen...

Claims

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Application Information

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IPC IPC(8): E21B7/04E21B47/00E21B49/00
Inventor 刘德伦罗于海罗拥军唐家琼罗利
Owner BC P INC CHINA NAT PETROLEUM CORP
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