Acknowledgments |
|
ix | |
|
1 Introduction to shale and tight reservoirs |
|
|
1 | (6) |
|
|
1 | (1) |
|
1.2 Definitions of shale and tight reservoirs |
|
|
2 | (4) |
|
1.3 Shale and tight resources |
|
|
6 | (1) |
|
1.4 Current production technologies |
|
|
6 | (1) |
|
2 Huff-n-puff gas injection in oil reservoirs |
|
|
7 | (54) |
|
|
7 | (1) |
|
2.2 Initial simulation studies of huff-n-puff gas injection |
|
|
8 | (1) |
|
|
9 | (9) |
|
|
18 | (2) |
|
2.5 Effects of pressure and pressure depletion rate |
|
|
20 | (5) |
|
2.6 Effect of soaking time |
|
|
25 | (4) |
|
2.7 EOR performance with number of cycles |
|
|
29 | (2) |
|
2.8 Effect of injected gas composition |
|
|
31 | (6) |
|
2.9 Minimum miscible pressure |
|
|
37 | (4) |
|
|
41 | (2) |
|
2.11 Effect of water saturation |
|
|
43 | (2) |
|
2.12 Effect of stress-dependent permeability |
|
|
45 | (1) |
|
2.13 Huff-n-puff mechanisms |
|
|
46 | (5) |
|
2.14 Gas penetration depth |
|
|
51 | (3) |
|
|
54 | (7) |
|
3 Asphaltene precipitation and deposition in a huff-n-puff process |
|
|
61 | (20) |
|
|
61 | (1) |
|
3.2 Experiments of asphaltene precipitation and permeability reduction |
|
|
61 | (8) |
|
3.3 Deposition mechanisms |
|
|
69 | (2) |
|
|
71 | (4) |
|
3.5 Effect of asphaltene deposition on huff-n-puff optimization |
|
|
75 | (6) |
|
4 Huff-n-puff injection in shale gas condensate reservoirs |
|
|
81 | (36) |
|
|
81 | (2) |
|
|
83 | (1) |
|
4.3 Huff-n-puff gas injection |
|
|
84 | (2) |
|
4.4 Huff-n-puff versus gas flooding |
|
|
86 | (5) |
|
4.5 Core-scale modeling of gas and solvent performance |
|
|
91 | (7) |
|
4.6 Reservoir-scale modeling of gas and solvent performance |
|
|
98 | (3) |
|
4.7 A field case of methanol injection |
|
|
101 | (1) |
|
|
102 | (3) |
|
4.9 Factors that affect huff-n-puff gas injection performance |
|
|
105 | (4) |
|
4.10 Optimization of huff-n-puff injection |
|
|
109 | (1) |
|
4.11 Mechanisms of huff-n-puff injection |
|
|
110 | (7) |
|
5 Optimization of huff-n-puff gas injection in shale and tight oil reservoirs |
|
|
117 | (16) |
|
|
117 | (1) |
|
5.2 Setup of a base simulation model |
|
|
118 | (3) |
|
5.3 Optimization principles |
|
|
121 | (1) |
|
5.4 Optimization criteria |
|
|
122 | (11) |
|
6 Gas flooding compared with huff-n-puff gas injection |
|
|
133 | (18) |
|
|
133 | (1) |
|
6.2 Research results on gas flooding |
|
|
133 | (4) |
|
6.3 Gas flooding versus huff-n-puff gas injection |
|
|
137 | (8) |
|
6.4 Field applications of gas flooding |
|
|
145 | (4) |
|
6.5 Feasibility of gas flooding |
|
|
149 | (2) |
|
|
151 | (22) |
|
|
151 | (1) |
|
|
151 | (5) |
|
7.3 Water huff-n-puff injection |
|
|
156 | (6) |
|
7.4 Waterflooding versus huff-n-puff water injection |
|
|
162 | (1) |
|
7.5 Water injection versus gas injection |
|
|
162 | (4) |
|
7.6 Water-alternating-gas (WAG) |
|
|
166 | (1) |
|
7.7 Huff-n-puff water and surfactant injection |
|
|
166 | (1) |
|
7.8 Water injection in China |
|
|
167 | (6) |
|
8 Fluid-rock interactions |
|
|
173 | (40) |
|
|
173 | (1) |
|
8.2 Evidences of microfractures generated or existing natural fractures reopened |
|
|
173 | (6) |
|
8.3 Effect of confining stress |
|
|
179 | (7) |
|
|
186 | (1) |
|
8.5 Effect of existing natural fractures |
|
|
186 | (1) |
|
8.6 Permeability changes from water-rock interactions |
|
|
187 | (4) |
|
8.7 Effect on rock mechanical properties |
|
|
191 | (3) |
|
8.8 Further discussions and summary of views and hypotheses |
|
|
194 | (3) |
|
8.9 Effect of low-pH and carbonated water |
|
|
197 | (5) |
|
8.10 Effect of high-pH water |
|
|
202 | (2) |
|
8.11 Cooling effect of injected water |
|
|
204 | (1) |
|
8.12 Reaction-induced fractures |
|
|
205 | (7) |
|
|
212 | (1) |
|
9 EOR mechanisms of wettability alteration and its comparison with IFT |
|
|
213 | (66) |
|
|
213 | (1) |
|
9.2 Mechanisms of interfacial tension (IFT) reduction |
|
|
214 | (3) |
|
9.3 Mechanisms of wettability alteration on oil recovery |
|
|
217 | (3) |
|
9.4 Mathematical treatments of wettability alteration and IFT effect |
|
|
220 | (6) |
|
9.5 IFT reduction versus wettability alteration |
|
|
226 | (10) |
|
9.6 Specific surfactant EOR mechanisms related to shale and tight formations |
|
|
236 | (6) |
|
9.7 Surfactant selection for wettability alteration |
|
|
242 | (11) |
|
9.8 Determination of wettability |
|
|
253 | (23) |
|
9.9 Conversion of wetting angles |
|
|
276 | (1) |
|
9.10 More on wettability of shale and tight formations |
|
|
277 | (2) |
|
10 Spontaneous imbibition |
|
|
279 | (30) |
|
|
279 | (1) |
|
10.2 Discussion of some theoretical equations on spontaneous imbibition |
|
|
279 | (6) |
|
10.3 Effect of permeability and porosity |
|
|
285 | (5) |
|
10.4 Effect of initial wettability and wettability alteration |
|
|
290 | (3) |
|
10.5 Effect of interfacial tension (IFT) |
|
|
293 | (3) |
|
|
296 | (1) |
|
|
297 | (4) |
|
10.8 Effect of viscosity ratio |
|
|
301 | (1) |
|
10.9 Effect of initial water content |
|
|
301 | (1) |
|
10.10 Countercurrent flow versus cocurrent flow |
|
|
301 | (2) |
|
10.11 Behaviors of different surfactants |
|
|
303 | (6) |
|
|
309 | (30) |
|
|
309 | (1) |
|
11.2 Description of a base shale model |
|
|
310 | (5) |
|
11.3 Shale rock versus sand rock |
|
|
315 | (6) |
|
11.4 Relative permeability change versus capillary pressure change |
|
|
321 | (1) |
|
11.5 Effect of capillary pressure |
|
|
322 | (4) |
|
11.6 Effect of pressure gradient (injection rate) |
|
|
326 | (5) |
|
11.7 Experimental study of forced imbibition |
|
|
331 | (5) |
|
11.8 Field tests of surfactant EOR |
|
|
336 | (3) |
|
12 Fracturing fluid flow back |
|
|
339 | (62) |
|
|
339 | (2) |
|
12.2 Field observations and experimental results on flow back |
|
|
341 | (4) |
|
12.3 Proposed mechanisms of low flow back |
|
|
345 | (14) |
|
12.4 Effect of shut-in time on flow back |
|
|
359 | (16) |
|
12.5 Shut-in time effect on fracture conductivity |
|
|
375 | (4) |
|
12.6 Effect of initial wettability on flow back |
|
|
379 | (6) |
|
12.7 Effect of invasion depth on flow back efficiency and late time oil rate |
|
|
385 | (5) |
|
12.8 Effect of surfactants on flow back |
|
|
390 | (5) |
|
12.9 Solutions to deal with flow back |
|
|
395 | (6) |
|
|
401 | (56) |
|
|
401 | (1) |
|
13.2 Laboratory experimental facilities |
|
|
402 | (5) |
|
|
407 | (20) |
|
|
427 | (8) |
|
13.5 Spontaneous ignition |
|
|
435 | (17) |
|
13.6 Oxygen consumption rate in low-temperature oxidation |
|
|
452 | (1) |
|
13.7 Minimum oil content for combustion |
|
|
453 | (1) |
|
13.8 Air requirement in combustion |
|
|
453 | (1) |
|
13.9 EOR mechanisms and EOR potential in shale and tight reservoirs |
|
|
454 | (3) |
|
14 Other enhanced oil recovery methods |
|
|
457 | (12) |
|
|
457 | (1) |
|
14.2 Sequential method of huff-n-puff CO2 injection and surfactant-assisted spontaneous imbibition |
|
|
457 | (1) |
|
|
458 | (2) |
|
|
460 | (1) |
|
|
461 | (1) |
|
|
462 | (1) |
|
|
463 | (1) |
|
14.8 Diversion technology in fracturing |
|
|
463 | (1) |
|
|
464 | (1) |
|
|
464 | (3) |
|
|
467 | (2) |
Nomenclature |
|
469 | (6) |
References |
|
475 | (38) |
Index |
|
513 | |