History and Actuality of Separate Layer Oil Production Technologies in
Daqing Oilfield

Pei, Xiaohan; Yang, Zhi-peng; Ban, Li; Liang, Yongtu

doi:10.2523/100859-ms

Cited by 5 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because of the pressure drops between the layers, the interlayer flow occurs and capillary imbibition effect strengthens, which finally enhance the sweep efficiency. According to the stages, it can be referred to as cyclic water injection, impulsive water injection, and intermittent injection [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Study on Dynamic Characteristics of Shut-In and Restart Process in Water Drive Strong Heterogeneous Oil Reservoir

Chen

Yang

et al. 2021

Geofluids

View full text Add to dashboard Cite

The main purpose of this investigation is to study the dynamic characteristics of shut-in and restart process in reservoirs with high water cut and strong vertical heterogeneity. The physical model, which includes three layers with low, medium, and high-permeability from top to bottom, was made according to the similarity law. Water drive test, the first restart test, and the second restart test were conducted, respectively. Water cut, oil recovery, and saturation distribution of the remaining oil were obtained during the tests. On this basis, mechanisms of shut-in and restart process of the reservoir were analyzed. It is concluded that appropriate developing plan such as layering mining and cyclic waterflooding should be implemented for developing strong heterogeneity reservoirs. The shut-in and restart tests showed that closing the water-flooded layer is beneficial for enlarging the sweep volume. Besides, water cut of 98% does not mean the economic limits of waterflooding. Under the effect of capillary force and gravitational differentiation, oil and water will redistribute in the formation. The redistribution of the oil and water, the fluctuation of the pressure difference, and the rebuild of the flow path, which produce parts of the bypassed oil, are the main mechanisms of the recovery enhancement by shut-in and restart operation. It should be noted that the shut-in and restart process indeed prolongs the waterflooding development. However, simply replying on the oil and water distribution under static conditions cannot greatly enhance the oil recovery.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Hydrodynamic methods like shut-in and restart process were greatly adopted and promoted in the oilfields, which achieved great improvements [19]. After the implement of these operations when the water cut of the production well achieved 98%, either it was shut-in or tertiary recovery methods are conducted [15].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Dynamic Characteristics of Shut-In and Restart Process in Water Drive Strong Heterogeneous Oil Reservoir

Chen

Yang

et al. 2021

Geofluids

View full text Add to dashboard Cite

show abstract

Simulation on adjustment ability of adjustable water nozzle in separate-layer water injection

Lan

2023

Petroleum Science and Technology

View full text Add to dashboard Cite

Adaptability Study on Dividing Approach of Accurate Water Injection in Well Block D

王¹

2014

IJFD

View full text Add to dashboard Cite

How to determine the water injection rate of separate layers rationally and effectively is a key part of water injection adjustment. The quality of dividing will directly have an impact on the development effect, especially for multi-layer sandstone reservoirs with severe interlayer heterogeneity. On one hand, the well determined rational water injection rate for a single layer and well can effectively control the rise of water and ease the tension of interlayer contradiction; on the other hand, it can also reduce inefficient water injection and lessen the burden of oil production and surface gathering. Commonly, the effective thickness approach, formation coefficient approach, filtrational resistance coefficient approach and dividing coefficient approach are used to determine the water injection rate of separate layers. The approaches mentioned above are all used to determine the water injection rate of separate layers in Well Block D. By comparing the results and injection profile, the rational dividing approach can be determined.

show abstract

History and Actuality of Separate Layer Oil Production Technologies in Daqing Oilfield

Cited by 5 publications

References 0 publications

Experimental Study on Dynamic Characteristics of Shut-In and Restart Process in Water Drive Strong Heterogeneous Oil Reservoir

Experimental Study on Dynamic Characteristics of Shut-In and Restart Process in Water Drive Strong Heterogeneous Oil Reservoir

Simulation on adjustment ability of adjustable water nozzle in separate-layer water injection

Adaptability Study on Dividing Approach of Accurate Water Injection in Well Block D

Contact Info

Product

Resources

About