Question

Question 5. Distinguish between primary, secondary and effective porosity (6 marks) Question 6. Explain the following key terms in a percolation process: Conductivity flow and Diffusivity flow (4 marks) miany

Question 6 please my teachers please

Answer 1

1: a; primary porosity Secondary porosity effective porosity of 1 Measure the interconne- 11. primary porosity is original porosity of the cted Yesexvior pore spaces in a " Secondary porosity is the pore Space created by sub- Sequent processes such fracturing. it formed. as when YOCK of its rock function as This is also a Vo lume bulk function the irreducible water saturation. the pore space in blu on 2; primary porosity is 2, Secondary porosity can be 2; Effective porosity excludes of by dissolution generated isolated pores and pore volume the detrital grains and Sedimentary grains. occupied by water absorbed within the depositional clay minerals, matrix. porosity means B; primary porosity is reff- 3 Secondary porosity is porosity 3; Effective Cred primary after deposition the inter- to as total that developed porosity less the burial of the sediment. clay - bound and water. geanualr porosity in the Sedimentary basin.

go The percolation process includes five steps. 1. Communition of drug. 2. imbibition of drug. 3 packing 4. Maceration 5. percolation Diffusivity flow & slowed is down. Flow on al the motion OF - The flow needs to travel The t the scales. time length regular R is no as longer, distance systems. flow : Conductivity The diffusion by is Coefficent related to the Einesten nernest equation the current is between opposite Conductivity DO Below Pc, there of the edges systems. The critical M is Semi universal. exponent