physics property of formation water at high pressure Xuanqi zhang Petroleum engineering college
physics property of formation water at high pressure Xuanqi zhang Petroleum engineering college
油藏物理学一地层水的高压物性 characteristic of formation water formation water is the floorboard of all kinds of water,such as edge water,bottom water,interlayer water and irreducible water. difference between formation water and ground water is that formation water contains a number of salt
油藏物理学——地层水的高压物性 characteristic of formation water formation water is the floorboard of all kinds of water, such as edge water, bottom water, interlayer water and irreducible water. difference between formation water and ground water is that formation water contains a number of salt
油藏物理学一地层水的高压物性 1.salinity/saltiness salinity expresses the how many salt formation water contains.Unit:mg/L or ppm 2、hardness hardness is the content of calcium,magnesium and other bivalent cation in formation water
油藏物理学——地层水的高压物性 1﹑salinity/saltiness salinity expresses the how many salt formation water contains. Unit: mg/L or ppm 2﹑hardness hardness is the content of calcium, magnesium and other bivalent cation in formation water
3,classification by sulin basic ions of water have cation: Na(K+)Mg2+Ca2+ negative ion:CI SO2- HCO Na sodium K:potassium/kalium Mg2+:magnesium Ca2+:calcium Cl-:chlorine SO2-:sulfate HCO:bicarbonate
3﹑classification by sulin basic ions of water have cation: Na+ (K+ ) Mg2+ Ca2+ negative ion: Cl- SO4 2- HCO3 - Na+ : sodium K+ :potassium/kalium Mg2+ : magnesium Ca2+: calcium Cl- : chlorine SO4 2- :sulfate HCO3 - : bicarbonate
油藏物理学一地层水的高压物性 classification by valent weight ratio of basic ion Na 1 Na CI >1 CI- CI- C CI-Na">1 CI-Na* Na'-CI<1 M82+ g2+ S0 2+ S02 CaCh MgCL NaHCO Na2SO gas field water seawater oil field water ground water
油藏物理学——地层水的高压物性 classification by valent weight ratio of basic ion gas field water seawater oil field water ground water 1 Cl Na 1 Cl Na 1 Cl Na 1 Cl Na 1 2 Mg Cl Na 1 2 Mg Cl Na 1 2 4 SO Na Cl 1 2 4 SO Na Cl CaCl2 MgCl2 NaHCO3 Na2 SO4
油藏物理学一地层水的高压物性 Physical property of formation water at high pressure l、water-gas ratio a.P,Rt b.salinity个，R↓ c.It is nearly independent of T. If temperature is low,TR(a little) If temperature is high,TtR(a little)
油藏物理学——地层水的高压物性 Physical property of formation water at high pressure 1﹑water- gas ratio a. P↑， R↑ b. salinity↑， R ↓ c. It is nearly independent of T. If temperature is low, T ↑ R↓ (a little) If temperature is high, T ↑ R↑ (a little)
油藏物理学一地层水的高压物性 2.Compressibility of formation water a.if T is constant,,P↑，Cw↓ b.if P is constant,T↑，Cx↑ c.if T and P are constant,R↑，Cw↑ Generally,Cw is from 3.7X 10-4/MPa to 5.0X10 4/Mpa
油藏物理学——地层水的高压物性 2. Compressibility of formation water a. if T is constant, P ↑ ，Cw ↓ T w w w P V V C ( ) 1 b. if P is constant, T ↑ ，Cw ↑ c. if T and P are constant, R↑ ，Cw ↑ Generally, Cw is from 3.7×10-4/MPa to 5.0×10- 4/Mpa
油藏物理学一地层水的高压物性 3.Water volume factor B wf Bm∈(1.01,1.02) WS Bwgas in waterBw fresh water Generally,Vws Vwt So,Bw≈1 P个，Bn↓ T个，Bn个 R个，B个
油藏物理学——地层水的高压物性 3. Water volume factor Bw gas in water>Bw fresh water ws wf w V V B (1.01,1.02) Bw Generally, Vws≈Vwf So, Bw ≈1 w w w R B T B P B , ,
油藏物理学一地层水的高压物性 4、water viscosity T↑，4W is nearly independent of pressure If T is constant,the more the salinity,the more uw We can refer fig.4-44
油藏物理学——地层水的高压物性 4﹑water viscosity T w is nearly independent of pressure , If T is constant, the more the salinity, the more μw. We can refer fig.4-44