Quantitative evaluation method for heavy oil steam huff and puff in water-flooded formation

A quantitative evaluation, water-flooded layer technology, applied in surveying, earth-moving, wellbore/well components, etc., can solve problems such as inability to judge the degree of water-out, unstable liquid production components, water-out at the bottom of the oil layer, etc. Conducive to promotion, good operability, simple application effect
CN104806231BActive Publication Date: 2017-07-07CHINA PETROLEUM & CHEM CORP +1
7 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2017-07-07

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a quantitative evaluation method of a heavy oil steam stimulation water flooded layer. The quantitative evaluation method of the heavy oil steam stimulation water flooded layer comprises the following steps: step 1, determining resistivity of mixed formation water of the heavy soil stimulation water flooded layer according to analysis assay data or logging curve data of the formation water of the water flooded layer; step 2, calculating oil reservoir water saturation Sw according to rock resistivity of a coring well by using an archies formula on the basis of determining the resistivity of the mixed formation water of the heavy oil stimulation water flooded layer; step 3, calculating oil displacement efficiency eta of the water flooded layer according to the calculated oil reservoir water saturation Sw and oil-water relative permeability test data of the coring well; step 4, establishing a heavy oil stimulation water flooding degree judgment standard to realize quantitative judgment and recognition of the water flooding degree of the heavy oil stimulation. The quantitative evaluation method of the heavy oil steam stimulation water flooded layer has better operability, contributes to generalization, and provides a practical and feasible method for fine description of the heavy oil reservoir stimulation water flooded layer.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of oilfield development, in particular to a quantitative evaluation method for heavy oil steam huff and puff water-flooded layers. Background technique

[0002] At present, the main targets of water flooding evaluation in major oilfields are water flooding thin oil reservoirs (the viscosity value of crude oil is generally less than 50mPa·s, and the density of crude oil is less than 0.9200g / cm 3 ), its evaluation method is not suitable for steam huff and puff heavy oil reservoirs (the viscosity of crude oil is generally greater than 50mPa·s, and the density of crude oil is greater than 0.9200g / cm 3 ), mainly in the following aspects:

[0003] 1. Heavy oil steam injection huff and puff development is an intermittent production method, and its development process is steam injection-simmering well-oil production-steam injection. The biggest difference from continuous production driven by water injection is that...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More