Horz Wells Inflow Perfm

8/10/2019 Horz Wells Inflow Perfm

1/24

Well Inflow Performance

HORIZONTAL WELLS


2/24

2

INFLOW PERFORMANCE IN HORIZONTAL WELLS


3/24

3

APLICATION OF HORIZONTAL WELLS

EXPLOITATION OF THIN GAS AND OIL SANDS

REDUCE WATER OR GAS CONING

INTERCEPT NATURAL FRACTURES

IMPROVE HEAVY OIL RECOVERY (EG. SAGD)

Kv>>>Kh

INCREASE SWEEP EFFICIENCY IN SECONDARY OILRECOVERY PROJECTS

CONECT DISCONTINUOUS ZONES

DRILL GEOLOGICALLY OPTIMIZED WELLS


4/24

4

METHODS TO DETETRMINE IPR IN HORIZONTAL WELLS

M !h"# !$% & M' "&

*'+$ 'v G$,"+-R"$ -J' + / J' h$ R"/ + -D 0 1 * 2 U/3"+$% & S$# & !$'/

E#0$+$% & C'++"& !$'/

*"/ 4h&$ 1 A5$5 F"!4'v$%h Ch"/,


5/24

5

Drainage Area of a Horizontal WellMETHOD 1 ( OSHI!

A) L'/,$! $/ & V$"6

Lh

4v

4h

2

72

L

*) P& /! V$"6

A""#$%tion& T'e rainagearea i" re%re"ente )* t+o

'alf ,ir,le" in ea,' en oft'e 'orizontal "e,tion +'i,' ra i#" i" )(e-#i.alent to t'e ra i#" ofa .erti,al +ell/ r e. ! %l#" are,tangle +it' i$en"ion"L0 )2


6/24

6

2

72

L

P& /! V$"6

A& Drainage area/ A,re"L& Lengt' of Horizontal "e,tion/ feet

)& 'alf $inor a0e of an elli%"e/ feet

A1 = b 2/2 A3 = b 2/2A2 = L (2b)

Drainage Area of a Horizontal WellMETHOD 1 ( OSHI!


7/247

A& Drainage Area/ A,re"L& Lengt' of Horizontal "e,tion/ feet

)& Half $inor a0e of an elli%"e/ feet

A& Half $a3or a0e of an elli%"e/ feet

) 4 r e. 4 rainage ra i#" of a .erti,al +ell/ feet

P& /! V$"6

L

b

a b

Drainage Area of a Horizontal WellMETHOD ( OSHI!


8/248

Drainage Area Co$%ari"on )et+een )ot' Met'o "

Both methods give different results forthe drainage area, therefore, Joshisuggests to take an average of both

values.

2

72

L

L

b

a

(1) (2)


9/24

E567ALENT DRAINA8E RADI6S FOR A HORIZONTAL WELL

A& Drainage Area/ A,re"

r eh : Horizontal rainage ra i#"/ feet


10/24

E!am"le

A 48#$acre lea%e &% 'o (e )e*elo"e) (+ ,%&n- .2 *er'&cal well%/ A%%,m&n- '0a' eac*er'&cal well wo,l) effec'&*el+ )ra&n 4# acre%1 calc,la'e '0e "o%%&(le n,m(er of e&'0.1###$ or 21###$f'$lon- 0or& on'al well% '0a' w&ll )ra&n '0e lea%e effec'&*el+/

.#


11/24..


12/24.2

IPR in Horizontal +ell"OSHI

DRAINAGE PATTERN OF AHORIZONTAL WELL AFTER JOSHI


13/24.3

A #0!$'/ 8 S!" 1 F&'6 / I '!+'0$% R" "+v'$+ ( ( )

Wh"+"

/



14/24.4

T' ! 4" $/!' %%' /! !h" +" "+v'$+ A/$ '!+'01

6h"+"

/



15/24.5

9A96:ODEH METHOD

Problem was analy ed in the same way as a verti!al well with "artial "enetration,assuming "seudosteady state flow.

( ) ( )

( ) ( ) R H w yoo z y x

h

S C r h L

Bk k L PI

++=

75.0lnln

00708.0 J

h

C H #ha"e fa!tor whi!h de"ends on the "osition of the well in the reservoir

S R #kin fa!tor due to "artial "enetration

IPR in Horizontal +ell"


16/24.6

C'++"& !$'/ 9'+ C H % &% & !$'/

( )

088.1ln5.0180sinln

3

128.6ln

2

+=

y

z ywo

y

w

y

w

y

z y H

k k

h

L

h z

L

y

L

y

k

k

h

LC

9A96:ODEH METHOD



17/24.7

E0er,i"e

A horizontal well with 2000 feet of horizontalsection drains an estimated area of 120 AcresThe resevoir has the following data:

Calculate the oil production using Joshismethod

sol


18/24.8


19/24.

F'+# !$'/ # ," $/ h'+$5'/! & 6"&&(E%'/'#$ " )

I ani

( ) s k

k I ar

ar

eq

s ani

H

vw

H

vw

=

+

+ +

ln

,max ,max11

43

12

2$ .


20/242#

E#0$+$% & C'++"& !$'/

*"/ 4h&$ 1 A5$5 F"!4'v$%h Ch"/,



21/242.

: P69 P69 ; < = V ( ) - (


22/2422

: ' ; C(P+ 7 = P69 7) /

FET;O7ICH



23/2423

CHEN8

(Pr$Pb)



24/24

Performance Im"ro*emen' ac'or PI

h

v

vert

hor

vert

hor

k

k

L

L

PI

PI PIF =

where%

PI Productivity Index

Lh'+ Net pay zone of horizontal sectionLv"+! Net pay zone of vertical sectionKv Vertical PermeabilityKh Horizontal Permeability

Horz Wells Inflow Perfm

Documents

Transcript of Horz Wells Inflow Perfm