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2 Prace Instytutu Górnictwa Naftowego i Gazownictwa

2 2000

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Uwolnienie wody związanej w skałach ilastych przyczyną powstawania wysadów ilastych oraz formowania złóż ropy naftowej

Zalajew N. Z., Klecan A.

Prace Instytutu Górnictwa Naftowego i Gazownictwa

2000

nr 110 wyd. konferencyjne

375--379

Release of bound water from silt rocks causes abnormal pressure zone generation and oil expulsion from source rocks. Under condition of quick subsidence and large silt layer thickness, with influence of unbalanced overburden gravity and tectonic forces, semi-liquid silt mass with abnormal pressure zone may easily moved and create diapir structures. The mass carries hydrocarbones, and oil deposits may be created within porous layers. There arc also possible non-structural oil deposits within thermally transformed shale beds (secondary fisured porosity as the result of bound water release).

Rola wody związanej w powstawaniu kolektorów szczelinowatych oraz ekspulsji ropy ze skał macierzystych

Zalajew N. Z.

Prace Instytutu Górnictwa Naftowego i Gazownictwa

2000

nr 110 wyd. konferencyjne

369--373

Part of water within silt rocks, so-called "free water", is squeezed out due to formation pressure. The left one is called "bound water". The bound water can be released from the rock with thermal energy increase, at about 120°C. The water release causes very high pressure (1000-1500 MPa) inside beds. As a result of that a fissured rock creation takes place. An impermeable rock becomes permeable, and the water, which is under very high pressure, move oil out of the source-rock. The bound water released from rocks causes secondary fissured porosity, increment of free water content in the rock as well as generation of an abnormal pressure zone. It also causes the expulsion of oil from the source-rock and initiates an oil migration process.