Parameters for Assessing Oil Reservoir Water Flooding Additives

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Nico Reuvers ◽  
Michael Golombok
Keyword(s):  
Fluid Flow ◽  
Shear Rate ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Water Flooding ◽  
Low Permeability ◽  
Oil Reservoir ◽  
Reservoir Water ◽  
Figures Of Merit ◽  
Relative Retardation

This paper is concerned with deriving parameters for assessing the effectiveness of fluid additives to improve water flooding during enhanced oil recovery. We focus particularly on the use of rheological modifiers, which do not show monotonic behavior with the shear rate within the rock pores. We derive figures of merit based on (1) relative retardation in high and low permeability rock, (2) profile flattening, and (3) injectivity index. Only the last of these provides a measure of water flood profile improvement while maintaining sufficient fluid flow and production levels.

scholarly journals Enhanced oil recovery ability of branched preformed particle gel in heterogeneous reservoirs

2018 ◽  
Vol 73 ◽  
pp. 65 ◽  
Author(s):  
Long Yu ◽  
Qian Sang ◽  
Mingzhe Dong
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Water Flooding ◽  
Low Permeability ◽  
High Permeability ◽  
Sweep Efficiency ◽  
Reservoir Heterogeneity ◽  
Heterogeneous Reservoirs ◽  
Preformed Particle Gel ◽  
Profile Control

Reservoir heterogeneity is the main cause of high water production and low oil recovery in oilfields. Extreme heterogeneity results in a serious fingering phenomenon of the displacing fluid in high permeability channels. To enhance total oil recovery, the selective plugging of high permeability zones and the resulting improvement of sweep efficiency of the displacing fluids in low permeability areas are important. Recently, a Branched Preformed Particle Gel (B-PPG) was developed to improve reservoir heterogeneity and enhance oil recovery. In this work, conformance control performance and Enhanced Oil Recovery (EOR) ability of B-PPG in heterogeneous reservoirs were systematically investigated, using heterogeneous dual sandpack flooding experiments. The results show that B-PPG can effectively plug the high permeability sandpacks and cause displacing fluid to divert to the low permeability sandpacks. The water injection profile could be significantly improved by B-PPG treatment. B-PPG exhibits good performance in profile control when the high/low permeability ratio of the heterogeneous dual sandpacks is less than 7 and the injected B-PPG slug size is between 0.25 and 1.0 PV. The oil recovery increment enhanced by B-PPG after initial water flooding increases with the increase in temperature, sandpack heterogeneity and injected B-PPG slug size, and it decreases slightly with the increase of simulated formation brine salinity. Choosing an appropriate B-PPG concentration is important for B-PPG treatments in oilfield applications. B-PPG is an efficient flow diversion agent, it can significantly increase sweep efficiency of displacing fluid in low permeability areas, which is beneficial to enhanced oil recovery in heterogeneous reservoirs.

Evaluation of enhanced oil recovery potential using gas/water flooding in a tight oil reservoir

Fuel ◽  
2020 ◽  
Vol 272 ◽  
pp. 117706 ◽  
Author(s):  
Xiang Zhou ◽  
Yongchao Wang ◽  
Liehui Zhang ◽  
Kewei Zhang ◽  
Qi Jiang ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Water Flooding ◽  
Tight Oil ◽  
Oil Reservoir ◽  
Recovery Potential ◽  
Tight Oil Reservoir

scholarly journals Low-cost PMMA-based microfluidics for the visualization of enhanced oil recovery

2018 ◽  
Vol 73 ◽  
pp. 26 ◽  
Author(s):  
Yiqiang Fan ◽  
Kexin Gao ◽  
Jie Chen ◽  
Wengang Li ◽  
Yajun Zhang
Keyword(s):  
Fluid Flow ◽  
Crude Oil ◽  
Porous Structure ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Low Cost ◽  
Rock Fracture ◽  
Microfluidic Devices ◽  
Water Flooding ◽  
Visible Range

About one-third of the crude oil is trapped inside the pores of the carbonate and sandstone after the primary and secondary oil recovery, various methods have been used for the flooding of the trapped crude oil. Due to the opaque nature of the sandstone and shale, the visualization of the fluid flow inside the porous structure conventionally involved the use of very sophisticated equipment like X-ray computed microtomography. In this approach, a low-cost method for the mimic of porous structure for the enhanced oil recovery is proposed using the polymethyl methacrylate (PMMA)-based microfluidic devices with the laser ablated microstructures, where the microstructure is the replica of a real rock fracture. Since the PMMA is optically clear in the visible range, the detailed fluid flow inside the porous structure could be obtained for a better understanding of the liquid front propagation and rheology in the pore-scale. The effect of water flooding is also tested with the proposed microfluidic devices under various flooding rates for the demonstration of oil recovery enhancement with the proposed technology.

Corrigendum to “Evaluation of enhanced oil recovery potential using gas/water flooding in a tight oil reservoir” [Fuel 272 (2020) 117706]

Fuel ◽  
2021 ◽  
Vol 303 ◽  
pp. 121185
Author(s):  
Xiang Zhou ◽  
Yongchao Wang ◽  
Jian Xiong ◽  
Kewei Zhang ◽  
Qi Jiang ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Water Flooding ◽  
Tight Oil ◽  
Oil Reservoir ◽  
Recovery Potential ◽  
Tight Oil Reservoir

Biostimulation of biogas producing microcosm for enhancing oil recovery in low-permeability oil reservoir

RSC Advances ◽  
2015 ◽  
Vol 5 (111) ◽  
pp. 91869-91877 ◽  
Author(s):  
H. Dong ◽  
Z. Z. Zhang ◽  
Y. L. He ◽  
Y. J. Luo ◽  
W. J. Xia ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Oil Reservoirs ◽  
Low Permeability ◽  
Oil Reservoir ◽  
Microbial Enhanced Oil Recovery ◽  
Conventional Oil

Indigenous microbial enhanced oil recovery (IMEOR) has been successfully applied in conventional oil reservoirs, however the mechanism in low-permeability oil reservoirs is still misunderstood.

scholarly journals Enhanced oil recovery mechanisms of polymer flooding in a heterogeneous oil reservoir

2021 ◽  
Vol 48 (1) ◽  
pp. 169-178
Author(s):  
Xiangguo LU ◽  
Bao CAO ◽  
Kun XIE ◽  
Weijia CAO ◽  
Yigang LIU ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Polymer Flooding ◽  
Oil Reservoir ◽  
Recovery Mechanisms
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