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20. Match the word phrases in the left column with the word phrases in the right. Find them in the text and write these sentences out. Give Russian equivalent to the English ones.

1. a fluid flow

2. the degree

3. the ratio

4. large and flat

5. reservoirs

6. the location

7. both permeability and porosity

A. grains uniformly arranged

B. of effective permeability

C. are called anisotropic

D. of sedimentary rocks

E. equation

F. of the cementing material within the pore space.

G. of consolidation and cementation

21.Fill in the gaps with the missing words.

A (1)________ rock must have the ability to allow (2)_______ fluids to flow through its interconnected (3)________. Permeability is affected by the type of (4)________ present, especially where fresh (5)________ is present. Petroleum reservoirs can have (6)________ permeability, which is also known as the (7)________ permeability and (8)________ permeability. Whereas, compaction and cementation generally (9)________ the primary permeability; fracturing and solution tend to (10)_______. Reservoirs having permeability below 1mD are considered (11)________. The factors affecting the (12)________ of permeability in sediments are: shape and size of sand grains, (13)________, fracturing and (14)________ .

    1. Answer the following questions.

1. What is permeability affected by?

2. Why has a fluid flow equation become one of the standard mathematical tools of the petroleum engineer?

3. If the porous rock is 100% saturated with a single fluid (phase), such as water, oil or gas, what term is used related to permeability?

4. Why is permeability called effective?

5. What is the result of fluid interference with each other?

6. Could you define the term “relative permeability”?

7. When did matrix permeability originate?

8. Why is primary permeability reduced?

9. What does secondary permeability provide?

10 Where are low permeability values generally found?

11. Are there any factors that affect the magnitude of permeability in sediments?

Terms and Vocabulary

adhesion

адгезия \ связанность (породы) \ слипание

wet

смачивать

water – wet

гидрофильный \ смачиваемый водой

brine-oil (rock system)

нефтепромысловые минерализованные пластовые воды

preference (preferentially)

избирательность \ избирательно

imbibe(v)

пропитывать (погружение)

displace (v)

вытеснять

be saturated with

насыщенный

interaction

взаимодействие

exhibit (v)

показывать \ проявлять

fractional wetting

смачивание отдельных пластов

spotted \ heterogeneous wetting (dalmatian wetting)

далматская смачиваемость

mixed wetting

смешанная смачиваемость

oil-wet

смачиваемый нефтью

filament

канал

path

путь (прохождения флюидов)

oil displacement

вытеснение нефти (из пласта)

residual oil saturation

остаточная нефтенасыщенность

invade (v)

проникать

brine

солёная вода, рассол

aqueous

водный

lining

внутреннее покрытие

electrostatic force

электростатическая сила

rupture (v)

разрывать \ разрушать

bulk phase

фаза мощности

wettability of formation

смачиваемость пласта

intermediate wetting

промежуточная смачиваемость

preferential wetting

предпочтительная смачиваемость

relative wetting

относительная смачиваемость

rock wetting

смачиваемость горной породы

film

плёнка

scattered

рассеянный

immiscible (fluids)

несмешивающиеся (флюиды)

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